Table 8.1.5.2: (a₁). Static Joint Strength of 100° Flush Head Alloy Steel Screws in Machine-Countersunk Aluminum Alloy Sheet and Plate

MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures

Last Updated 29 Oct 2026

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Fastener Type	AN509^a steel screw (F_su = 75 ksi) w/MS20365 or equiv. steel nut
Sheet and Plate Material	Clad 2024-T3 and T351
Fastener Diameter, in.	3/16	1/4	5/16	3/8	1/2
(Nominal Shank Diameter, in.)	(0.190)	(0.250)	(0.312)	(0.375)	(0.500)
	Ultimate Strength^e, lbs
Sheet or plate thickness, in.:
0.080	1576^b,c
0.090	1726^b
0.100	1877^b	2567^b,c
0.125	2126^b	3054^b	3922^b,c	4579^b,c
0.160		3536^b	4722^b	5878^b
0.190		3682	5405^b	6872^b	9408^b,c
0.250			5750	8280^b	12201^b
0.312				8280^b	14141^b
0.375					14730
Fastener shear strength^d	2126	3682	5750	8280	14730
	Yield Strength^e,f, lbs
Sheet or plate thickness, in.:
0.080	903
0.090	989
0.100	1084	1490
0.125	1296	1748	2001	2559
0.160	1615	2116	2334	2939
0.190		2484	2702	3361	6012
0.250			3404	4197	7306
0.312				5092	8452
0.375					9996
Head height (ref.), in	0.080	0.106	0.133	0.159	0.213

a This fastener is no longer manufactured; do not specify for new designs.
b Yield value is less than 2/3 of the indicated ultimate strength value.
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on area computed from nominal shank diameters in Table 9.7.1.1 and $F_{s u}=75 \mathrm{ksi}$ .
e Test data from which the yield and ultimate strengths were derived can be found in Reference 8.1.5.2.
f Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (a₂). Static Joint Strength of 100° Flush Head Alloy Steel Screws in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Diameter, in. (Nominal Shank Diameter, in.)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)	1/2 (0.500)
Fastener Type	AN509^a steel screw (F_su = 75 ksi) w/MS20365 or equiv. steel nut
Sheet and Plate Material	Clad 7075-T6 and T651
	Ultimate Strength^b, lbs
Sheet or plate thickness, in.:
0.080	1632^c,d
0.090	1762^c
0.100	1892	2723^c,d
0.125	2126	3109^c	4180^c,d	5216^c,d
0.160		3551^c	4858^c	6193^c
0.190		3682	5433^c	6996^c
0.250			5750	8280^c	12421^c,d
0.312				8280	14185^c
0.375					14730
Fastener shear strength^e	2126	3682	5750	8280	14730
	Yield Strength^b,f, lbs
Sheet or plate thickness, in.:
0.080	965
0.090	1063
0.100	1179	1600
0.125	1462	1895	2098	2699
0.160		2363	2501	3088
0.190		2926	3018	3601
0.250			4312	4868	8041
0.312				6624	9437
0.375					11686
Head height (ref.), in.	0.080	0.106	0.133	0.159	0.213

a This fastener is no longer manufactured; do not specify for new designs.
b Test data from which the yield and ultimate strengths were derived can be found in Reference 8.1.5.2.
c Yield value is less than 2/3 of the indicated ultimate strength value.
d Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
e Fastener shear strength based on area computed from nominal shank diameters in Table 9.7.1.1 and $F_{s u}=75 \mathrm{ksi}$ .
f Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (b). Static Joint Strength of 100° Flush Head Stainless Steel (PH13-8Mo-H1000) Fasteners in Machine-Countersunk Titanium Alloy Sheet and Plate

Fastener Type	PBF 11^a (F_su = 125 ksi)
Sheet and Plate Material	Annealed Ti-6Al-4V
Rivet Diameter, in. (Nominal Shank Diameter, in.)^b	5/32 (0.164)	1/4 (0.250)	3/8 (0.375)	1/2 (0.500)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	1535^c
0.050	1963
0.063	2528	3656
0.071	2640	4213
0.080		4813	6820
0.090		5438	7818
0.100		6140	8775	11250^c
0.125			11264	14575
0.160			13810	19250
0.190				23200
0.200				24540
Fastener shear strength^d	2640	6140	13810	24540
	Yield Strength^c, lbs
Sheet or plate thickness, in.:
0.040	1237
0.050	1543
0.063	1947	2969
0.071	2049	3350
0.080		3756	5667
0.090		4219	6370
0.100		4600	7101	9500
0.125			8789	11825
0.160			10645	15025
0.190				17825
0.200				18400
Head height (nom.), in.	0.040	0.060	0.077	0.101

a Data supplied by Huck Manufacturing Company and PB Fasteners.
b Fasteners installed in clearance holes (0.0025-0.0030).
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on areas computed from indicated nominal shank diameter $F_{s u}=125 \mathrm{ksi}$ .
e Permanent set at yield load: 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (c). Static Joint Strength of 100° Flush Head Tapered Alloy Steel Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Diameter, in. (Nominal Shank Diameter, in.)	3/16	1/4	5/16	3/8	7/16	½
Fastener Type	TL 100^a (F_su = 108 ksi)
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)	(0.1969)	(0.2585)	(0.3214)	(0.3860)	(0.4490)	(0.5122)
Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.100	2435
0.125	2913	3745	4443
0.160	3290	4831	6017	7016	7993
0.190		5269	7017	8511	9737	10900
0.250		5670	8148	11120	13220	14890
0.285			8760	11360	15000	17240
0.312				11570	15280	19000
0.344				11800	15560	19800
0.375				12030	15820	20110
0.500				12640	16870	21320
Fastener shear strength^b	3290	5670	8760	12640	17100	22250
Yield Strength^c, lbs
Sheet or plate thickness, in.:
0.100	1960
0.125	2350	2990	3818
0.160	2840	3550	4650	5650	6703
0.190		3970	5308	6596	7806	9045
0.250		4830	6450	8209	9903	11560
0.285			7060	9090	10930	12840
0.312				9680	11780	13930
0.344				10010	12710	14930
0.375				10430	13200	16000
0.500					15160	18490
Head height (max.), in.	0.048	0.063	0.070	0.081	0.100	0.110

a Data supplied by Briles Manufacturing Company.
b Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=108 \mathrm{ksi}$ .
c Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (d). Static Joint Strength of 100° Flush Head Tapered STA Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	TLV 10^a (F_su = 95 ksi)
Sheet Material	Clad 7075-T6
Fastener Diameter, in. (Nominal Shank Diameter, in.)	1/8 (0.1437)	5/32 (0.1688)	3/16 (0.1965)	1/4 (0.2583)
	Ultimate Strength, lbs
Sheet thickness, in.:
0.032	488^b
0.040	610	713^b	826^b
0.050	768	896	1050
0.063	967	1145	1312	1730^b
0.071	1120	1290	1491	1960
0.080	1260	1470	1690	2223
0.090	1377	1670	1910	2505
0.100	1441	1845	2130	2800
0.125	1530	2010	2580	3540
0.160	1540	2125	2800	4410
0.190			2880	4750
0.250				4980
Fastener shear strength^c	1540	2125	2880	4980
	Yield Strength^d, lbs
Sheet thickness, in.:
0.032	488
0.040	610	713	826
0.050	753	890	1050
0.063	925	1118	1301	1730
0.071	1035	1240	1467	1960
0.080	1138	1377	1637	2192
0.090	1238	1522	1806	2455
0.100	1321	1639	1976	2711
0.125	1480	1880	2331	3304
0.160	1540	2111	2683	3986
0.190			2880	4437
0.250				4980
Head height (max.), in.	0.033	0.041	0.048	0.063

a Data supplied by Lockheed Georgia Company.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of fractional diameter.

MIL-HDBK-5J

8.1.5.2 (e). Static Joint Strength of 70° Flush Head Tapered Ti-6Al-4V Fasteners in Non-Matching Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HPB-V^a (F_su = 95 ksi)
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter (Nominal Shank Diameter, in.)^b	3/16	1/4	5/16	3/8
Fastener Diameter (Nominal Shank Diameter, in.)^b	(0.1976)	(0.2587)	(0.3211)	(0.3850)
Sheet Countersink Angle	82°	82°	82°	75°
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.063	1355
0.071	1554	2041
0.080	1710	2296
0.090	1847	2583	3207
0.100	1984	2864	3567	4269
0.125	2319	3293	4454	5336
0.160	2792	3908	5176	6611
0.190	2913	4444	5836	7396
0.250		4993	7155	8968
0.312			7692	10613
0.375				11058
0.500				11058
Fastener shear strength^c	2913	4993	7692	11058
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.063	1269
0.071	1429	1874
0.080	1613	2108
0.090	1812	2376	2949
0.100	1984	2637	3279	3928
0.125	2319	3299	4093	4906
0.160	2718	3908	5176	6285
0.190	2913	4397	5836	7396
0.250		4993	6980	8968
0.312			7692	10257
0.375				11058
0.500				11058
Head height (max.), in	0.057	0.067	0.076	0.086

a Data supplied by PB Fasteners.
b Fasteners installed in interference holes (0.0015-0.0048).
c Fastener shear strength based on areas computed from the indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (f). Static Joint Strength of 100° Flush Shear Head Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	KLBHV Pin (F_su = 95 ksi), KFN 600 Nut^a
Sheet Material	Clad 7075-T6
Fastener Diameter, in. (Nominal Shank Diameter, in.)^b	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.3125)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet thickness, in.:
0.040	748^c
0.050	987	1112
0.063	1291	1462	1813^c
0.071	1428	1679	2100
0.080	1571	1888	2438	2902
0.090	1722	2058	2794	3322	3867
0.100	1883	2231	3150	3810	4402
0.125	2007	2694	3725	4924	5724
0.160			4531	4901	7397
0.190			4660	6790	8452
0.200				7083	8789
0.250				7290	10490
Fastener shear strength^d	2007	2694	4660	7290	10490
	Yield Strength^e, lbs
Sheet thickness, in.:
0.040	594
0.050	740	859
0.063	931	1079	1419
0.071	1049	1213	1600
0.080	1176	1368	1806	2267
0.090	1283	1534	2031	2540	3052
0.100	1375	1675	2250	2824	3375
0.125	1606	1942	2813	3517	4219
0.160			3306	4455	5386
0.190			3725	4983	6385
0.200				5168	6581
0.250				6038	7636
Head height (ref.), in.	0.043	0.048	0.063	0.070	0.081

a Data supplied by Kaynar Manufacturing Co., Inc.
b Fasteners installed in interference holes (0.003-0.055).
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
e Permanent set at yield load: 4% of the nominal diameter.

MIL-HDBK-5J

8.1.5.2 (g). Static Joint Strength of 100° Flush Shear AISI 431° Hi-Lok Fasteners in Aluminum Alloy Sheet and Plate

Rivet Type	HL 61 Pin (F_su = 125 ksi), HL 70 Collar^b
Sheet and Plate Material	Clad 7075-T6 and T651
Rivet Diameter	3/16	1/4	5/16	3/8
(Nominal Shank Diameter, in.)	(0.190)	(0.250)	(0.312)	(0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.090	2327
0.100	2430	3740
0.125	2695	4080
0.160	3070	4560	6500^c
0.190	3390	4970	7160	9100
0.250	3544	5800	8320	10230
0.312		6140	9590	11390
0.375				12580
0.500				13810
Fastener shear strength^d	3544	6140	9590	13810
	Yield Strength^e, lbs
Sheet or plate thickness, in.:
0.090	1840
0.100	1943	2900
0.125	2195	3240
0.160	2540	3700	4030
0.190	2840	4020	5430	7120
0.250	3110	4870	6590	8500
0.312		5350	7580	9700
0.375			7890	10410
0.500				12070
Head height (max.), in	0.049	0.063	0.077	0.051

a AISI 431 is prohibited from use in Air Force and Navy structure by MIL-STD-1568 and SD-24, respectively, because of its sensitivity to heat treatment. Use of fasteners made of this material in design of military aerospace structures requires the specific approval of the procuring agency.
b Data supplied by Hi-Shear Corporation.
c Yield value is less than 2/3 of the indicated ultimate strength value.
d Fastener shear strength based on areas computed from the indicated nominal shank diameter and $F_{s u}=125 \mathrm{ksi}$ .
e Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (h). Static Joint Strength of 100° Flush Shear Head Alloy Steel Hi-Lok Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HL 719 Pin (F_su = 108 ksi), HL 79 Collar^a
Sheet and Plate Material	7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)^b	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	734^c
0.050	1044	1131
0.063	1384	1565	1813
0.071	1518	1820	2216
0.080	1668	1998	2594	2916
0.090	1764	2193	3015	3532	3724
0.100	1825	2345	3338	4059	4516
0.125	1979	2524	3980	5229	6167
0.160	2195	2774	4350	6347	7928
0.190		2989	4634	6702	9087
0.250		3062	5200	7512	9985
0.312			5300	8146	10870
0.375				8280	11760
Fastener shear strength^d	2281	3062	5300	8280	11930
	Yield Strength^e, lbs
Sheet or plate thickness, in.:
0.040	690
0.050	861	1000
0.063	1086	1261	1664
0.071	1224	1421	1876
0.080	1346	1601	2114	2647
0.090	1478	1771	2378	2978	3578
0.100	1610	1924	2642	3309	3976
0.125	1845	2308	3210	4136	4970
0.160	2022	2583	3920	5124	6362
0.190		2750	4344	5886	7330
0.250		3062	4785	6925	9160
0.312				7496	10130
0.375				8158	10820
Head height (nom.), in.	0.040	0.046	0.060	0.067	0.077

a Data supplied by Hi-Shear Corporation.
b Fasteners installed in interference holes (0.001-0.002).
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=108 \mathrm{ksi}$ .
e Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (i). Static Joint Strength of 100° Flush Shear Head Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HL 11 Pin (F_su = 95 ksi), HL 70 Collar^a
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)	5/32	3/16	1/4	5/16
Fastener Diameter, in. (Nominal Shank Diameter, in.)	(0.164)	(0.190)	(0.250)	(0.312)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	734^b	837^b
0.050	941	1083	1343^b
0.063	1207	1393	1762	2170^b
0.071	1385	1588	2012	2463
0.080	1557	1779	2281	2823
0.090	1775	2050	2594	3193
0.100	1876	2263	2919	3631
0.125	1950	2542	3765	4594
0.160	2007	2660	3970	5890
0.190		2694	4165	6105
0.250			4530	6580
0.312			4660	7050
0.375				7290
Fastener shear strength^c	2007	2694	4660	7290
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.040	674	794
0.050	835	982	1325
0.063	1038	1230	1655	2141
0.071	1130	1355	1813	2338
0.080	1230	1480	2062	2620
0.090	1342	1625	2250	2880
0.100	1440	1750	2470	3420
0.125	1670	2020	2930	3860
0.160	1891	2360	3480	4620
0.190		2560	3840	5150
0.250			4440	6170
0.312			4660	6900
0.375				7290
Head height (nom.), in	0.040	0.046	0.060	0.067

a Data supplied by Hi-Shear Corporation.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (j). Static Joint Strength of 100° Flush Shear Head Ti-6Al-6V-2Sn Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HL 911 Pin (F_su = 108 ksi), HL 70 Collar^a
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	780^b
0.050	982	1137	1456^b
0.063	1264	1458	1863	2287^b
0.071	1426	1642	2094	2570	3096^b
0.080	1622	1866	2425	2920	3473
0.090	1740	2105	2750	3339	3965
0.100	1794	2310	3063	3777	4415
0.125	1915	2455	3875	4770	5666
0.160	2098	2660	4219	6181	7339
0.190	2252	2840	4450	6483	8788
0.250	2281	3062	4925	7067	9589
0.312			5300	7670	10362
0.375				8280	11079
0.500					11930
Fastener shear strength^c	2281	3062	5300	8280	11930
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.040	734
0.050	882	1044	1394
0.063	1076	1300	1750	2190
0.071	1184	1406	1938	2472	2995
0.080	1320	1540	2188	2774	3332
0.090	1392	1680	2375	3066	3768
0.100	1480	1810	2569	3358	4120
0.125	1700	2085	3031	4010	5019
0.160	1870	2380	3563	4818	6074
0.190	1978	2530	3937	5354	6749
0.250	2178	2740	4375	6269	8183
0.312			4687	6883	9209
0.375				7418	9870
0.500					11039
Head height (nom.), in.	0.040	0.046	0.060	0.067	0.077

a Data supplied by Hi-Shear Corporation.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=108 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (k). Static Joint Strength of 100° Flush Head Ti-6Al-6V-2Sn or Alloy Steel, Shear Type Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	NAS 4452S and KS 100-FV Pins^a (F_su = 108 ksi), NAS 4445DD Nut
Sheet Material	7075-T6
Fastener Diameter, in.	1/8	5/32	3/16	1/4
(Nominal Shank Diameter, in.)	(0.138)	(0.164)	(0.190)	(0.250)
	Ultimate Strength, lbs
Sheet thickness, in.:
0.040	644
0.050	857	976	1065
0.063	1131	1305	1458	1750^b
0.071	1268	1512	1697	2062
0.080	1428	1703	1964	2406
0.090	1499	1910	2227	2794
0.100	1539	2084	2458	3181
0.125	1615	2200	2848	4063
0.160		2281	3036	4900
0.190			3062	5113
0.250				5300
Fastener shear strength^c	1615	2281	3062	5300
	Yield Strength^d, lbs
Sheet thickness, in.:
0.040	609
0.050	766	906	1029
0.063	946	1157	1325	1706
0.071	1044	1278	1505	1956
0.080	1152	1412	1668	2219
0.090	1261	1555	1848	2500
0.100	1320	1694	2014	2762
0.125	1444	1904	2397	3350
0.160		2106	2661	4100
0.190			2845	4419
0.250				4925
Head height (max.), in.	0.037	0.040	0.049	0.063

a Data supplied by Huck Manufacturing Company.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength is documented in NAS 4444.
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (l). Static Joint Strength of 70° Flush Head Straight Shank Ti-6Al-4V Fasteners in Non-Matching Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HPT-V^a (F_su= 95 ksi)
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter (Nominal Shank Diameter, in.)^b	3/16 (0.193)	1/4 (0.255)	5/16 (0.3175)	3/8 (0.380)
Sheet Countersink Angle	82°	82°	82°	75°
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.063	1348
0.071	1546	1970
0.080	1704	2275
0.090	1814	2580	3125
0.100	1948	2873	3528	4100
0.125	2265	3282	4465	5270
0.160	2700	3868	5171	6642
0.190	2779	4361	5826	7393
0.250		4851	7056	8880
0.312			7521	10396
0.375				10774
Fastener shear strength^c	2779	4851	7521	10774
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.063	1180
0.071	1378	1651
0.080	1590	1944
0.090	1702	2321	2631
0.100	1818	2620	3024	3350
0.125	2112	3055	4133	4664
0.160	2496	3601	4848	6209
0.190	2734	4062	5413	6902
0.250		4745	6552	8288
0.312			7378	9631
0.375				10584
Head height (max.), in.	0.060		0.080	0.090

a Data supplied by PB Fasteners.
b Fasteners installed in interference holes (0.0045-0.0055).
c Fastener shear strength based on areas computed from the indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (m). Static Joint Strength of 100° Flush Shear Head STA Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	NAS 4452V Pin (F_su = 95 ksi), NAS 4445D Nut^a
Sheet Material	Clad 7075-T6
Fastener Diameter, in. (Nominal Shank Diameter, in.)	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	766^b
0.050	1092	1173
0.063	1450	1639	1886^b
0.071	1633	1889	2290
0.080	1805	2136	2710	3028
0.090	1955	2368	3135	3651
0.100	2007	2557	3515	4230	4669
0.125		2694	4273	5485	6428
0.160			4660	6776	8426
0.190				7290	9708
0.250					10490
Fastener shear strength^c	2007	2694	4660	7290	10490
	Yield Strength^d, lbs
Sheet thickness, in.:
0.040	712
0.050	891	1034
0.063	1103	1295	1712
0.071	1223	1445	1932
0.080	1349	1604	2169	2715
0.090	1475	1768	2420	3056
0.100	1489	1920	2658	3383	4082
0.125		2241	3196	4145	5072
0.160			3812	5076	6321
0.190				5746	7265
0.250					8802
Head height (max.), in.	0.040	0.049	0.063	0.077	0.091

a Data supplied by Huck Manufacturing Company.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength is documented in NAS 4444.
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

Table 8.1.5.2: (a₁). Static Joint Strength of 100° Flush Head Alloy Steel Screws in Machine-Countersunk Aluminum Alloy Sheet and Plate

MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures

Last Updated 29 Oct 2026

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Fastener Type	AN509^a steel screw (F_su = 75 ksi) w/MS20365 or equiv. steel nut
Sheet and Plate Material	Clad 2024-T3 and T351
Fastener Diameter, in.	3/16	1/4	5/16	3/8	1/2
(Nominal Shank Diameter, in.)	(0.190)	(0.250)	(0.312)	(0.375)	(0.500)
	Ultimate Strength^e, lbs
Sheet or plate thickness, in.:
0.080	1576^b,c
0.090	1726^b
0.100	1877^b	2567^b,c
0.125	2126^b	3054^b	3922^b,c	4579^b,c
0.160		3536^b	4722^b	5878^b
0.190		3682	5405^b	6872^b	9408^b,c
0.250			5750	8280^b	12201^b
0.312				8280^b	14141^b
0.375					14730
Fastener shear strength^d	2126	3682	5750	8280	14730
	Yield Strength^e,f, lbs
Sheet or plate thickness, in.:
0.080	903
0.090	989
0.100	1084	1490
0.125	1296	1748	2001	2559
0.160	1615	2116	2334	2939
0.190		2484	2702	3361	6012
0.250			3404	4197	7306
0.312				5092	8452
0.375					9996
Head height (ref.), in	0.080	0.106	0.133	0.159	0.213

a This fastener is no longer manufactured; do not specify for new designs.
b Yield value is less than 2/3 of the indicated ultimate strength value.
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on area computed from nominal shank diameters in Table 9.7.1.1 and $F_{s u}=75 \mathrm{ksi}$ .
e Test data from which the yield and ultimate strengths were derived can be found in Reference 8.1.5.2.
f Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (a₂). Static Joint Strength of 100° Flush Head Alloy Steel Screws in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Diameter, in. (Nominal Shank Diameter, in.)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)	1/2 (0.500)
Fastener Type	AN509^a steel screw (F_su = 75 ksi) w/MS20365 or equiv. steel nut
Sheet and Plate Material	Clad 7075-T6 and T651
	Ultimate Strength^b, lbs
Sheet or plate thickness, in.:
0.080	1632^c,d
0.090	1762^c
0.100	1892	2723^c,d
0.125	2126	3109^c	4180^c,d	5216^c,d
0.160		3551^c	4858^c	6193^c
0.190		3682	5433^c	6996^c
0.250			5750	8280^c	12421^c,d
0.312				8280	14185^c
0.375					14730
Fastener shear strength^e	2126	3682	5750	8280	14730
	Yield Strength^b,f, lbs
Sheet or plate thickness, in.:
0.080	965
0.090	1063
0.100	1179	1600
0.125	1462	1895	2098	2699
0.160		2363	2501	3088
0.190		2926	3018	3601
0.250			4312	4868	8041
0.312				6624	9437
0.375					11686
Head height (ref.), in.	0.080	0.106	0.133	0.159	0.213

a This fastener is no longer manufactured; do not specify for new designs.
b Test data from which the yield and ultimate strengths were derived can be found in Reference 8.1.5.2.
c Yield value is less than 2/3 of the indicated ultimate strength value.
d Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
e Fastener shear strength based on area computed from nominal shank diameters in Table 9.7.1.1 and $F_{s u}=75 \mathrm{ksi}$ .
f Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (b). Static Joint Strength of 100° Flush Head Stainless Steel (PH13-8Mo-H1000) Fasteners in Machine-Countersunk Titanium Alloy Sheet and Plate

Fastener Type	PBF 11^a (F_su = 125 ksi)
Sheet and Plate Material	Annealed Ti-6Al-4V
Rivet Diameter, in. (Nominal Shank Diameter, in.)^b	5/32 (0.164)	1/4 (0.250)	3/8 (0.375)	1/2 (0.500)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	1535^c
0.050	1963
0.063	2528	3656
0.071	2640	4213
0.080		4813	6820
0.090		5438	7818
0.100		6140	8775	11250^c
0.125			11264	14575
0.160			13810	19250
0.190				23200
0.200				24540
Fastener shear strength^d	2640	6140	13810	24540
	Yield Strength^c, lbs
Sheet or plate thickness, in.:
0.040	1237
0.050	1543
0.063	1947	2969
0.071	2049	3350
0.080		3756	5667
0.090		4219	6370
0.100		4600	7101	9500
0.125			8789	11825
0.160			10645	15025
0.190				17825
0.200				18400
Head height (nom.), in.	0.040	0.060	0.077	0.101

a Data supplied by Huck Manufacturing Company and PB Fasteners.
b Fasteners installed in clearance holes (0.0025-0.0030).
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on areas computed from indicated nominal shank diameter $F_{s u}=125 \mathrm{ksi}$ .
e Permanent set at yield load: 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (c). Static Joint Strength of 100° Flush Head Tapered Alloy Steel Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Diameter, in. (Nominal Shank Diameter, in.)	3/16	1/4	5/16	3/8	7/16	½
Fastener Type	TL 100^a (F_su = 108 ksi)
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)	(0.1969)	(0.2585)	(0.3214)	(0.3860)	(0.4490)	(0.5122)
Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.100	2435
0.125	2913	3745	4443
0.160	3290	4831	6017	7016	7993
0.190		5269	7017	8511	9737	10900
0.250		5670	8148	11120	13220	14890
0.285			8760	11360	15000	17240
0.312				11570	15280	19000
0.344				11800	15560	19800
0.375				12030	15820	20110
0.500				12640	16870	21320
Fastener shear strength^b	3290	5670	8760	12640	17100	22250
Yield Strength^c, lbs
Sheet or plate thickness, in.:
0.100	1960
0.125	2350	2990	3818
0.160	2840	3550	4650	5650	6703
0.190		3970	5308	6596	7806	9045
0.250		4830	6450	8209	9903	11560
0.285			7060	9090	10930	12840
0.312				9680	11780	13930
0.344				10010	12710	14930
0.375				10430	13200	16000
0.500					15160	18490
Head height (max.), in.	0.048	0.063	0.070	0.081	0.100	0.110

a Data supplied by Briles Manufacturing Company.
b Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=108 \mathrm{ksi}$ .
c Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (d). Static Joint Strength of 100° Flush Head Tapered STA Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	TLV 10^a (F_su = 95 ksi)
Sheet Material	Clad 7075-T6
Fastener Diameter, in. (Nominal Shank Diameter, in.)	1/8 (0.1437)	5/32 (0.1688)	3/16 (0.1965)	1/4 (0.2583)
	Ultimate Strength, lbs
Sheet thickness, in.:
0.032	488^b
0.040	610	713^b	826^b
0.050	768	896	1050
0.063	967	1145	1312	1730^b
0.071	1120	1290	1491	1960
0.080	1260	1470	1690	2223
0.090	1377	1670	1910	2505
0.100	1441	1845	2130	2800
0.125	1530	2010	2580	3540
0.160	1540	2125	2800	4410
0.190			2880	4750
0.250				4980
Fastener shear strength^c	1540	2125	2880	4980
	Yield Strength^d, lbs
Sheet thickness, in.:
0.032	488
0.040	610	713	826
0.050	753	890	1050
0.063	925	1118	1301	1730
0.071	1035	1240	1467	1960
0.080	1138	1377	1637	2192
0.090	1238	1522	1806	2455
0.100	1321	1639	1976	2711
0.125	1480	1880	2331	3304
0.160	1540	2111	2683	3986
0.190			2880	4437
0.250				4980
Head height (max.), in.	0.033	0.041	0.048	0.063

a Data supplied by Lockheed Georgia Company.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of fractional diameter.

MIL-HDBK-5J

8.1.5.2 (e). Static Joint Strength of 70° Flush Head Tapered Ti-6Al-4V Fasteners in Non-Matching Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HPB-V^a (F_su = 95 ksi)
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter (Nominal Shank Diameter, in.)^b	3/16	1/4	5/16	3/8
Fastener Diameter (Nominal Shank Diameter, in.)^b	(0.1976)	(0.2587)	(0.3211)	(0.3850)
Sheet Countersink Angle	82°	82°	82°	75°
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.063	1355
0.071	1554	2041
0.080	1710	2296
0.090	1847	2583	3207
0.100	1984	2864	3567	4269
0.125	2319	3293	4454	5336
0.160	2792	3908	5176	6611
0.190	2913	4444	5836	7396
0.250		4993	7155	8968
0.312			7692	10613
0.375				11058
0.500				11058
Fastener shear strength^c	2913	4993	7692	11058
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.063	1269
0.071	1429	1874
0.080	1613	2108
0.090	1812	2376	2949
0.100	1984	2637	3279	3928
0.125	2319	3299	4093	4906
0.160	2718	3908	5176	6285
0.190	2913	4397	5836	7396
0.250		4993	6980	8968
0.312			7692	10257
0.375				11058
0.500				11058
Head height (max.), in	0.057	0.067	0.076	0.086

a Data supplied by PB Fasteners.
b Fasteners installed in interference holes (0.0015-0.0048).
c Fastener shear strength based on areas computed from the indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (f). Static Joint Strength of 100° Flush Shear Head Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	KLBHV Pin (F_su = 95 ksi), KFN 600 Nut^a
Sheet Material	Clad 7075-T6
Fastener Diameter, in. (Nominal Shank Diameter, in.)^b	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.3125)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet thickness, in.:
0.040	748^c
0.050	987	1112
0.063	1291	1462	1813^c
0.071	1428	1679	2100
0.080	1571	1888	2438	2902
0.090	1722	2058	2794	3322	3867
0.100	1883	2231	3150	3810	4402
0.125	2007	2694	3725	4924	5724
0.160			4531	4901	7397
0.190			4660	6790	8452
0.200				7083	8789
0.250				7290	10490
Fastener shear strength^d	2007	2694	4660	7290	10490
	Yield Strength^e, lbs
Sheet thickness, in.:
0.040	594
0.050	740	859
0.063	931	1079	1419
0.071	1049	1213	1600
0.080	1176	1368	1806	2267
0.090	1283	1534	2031	2540	3052
0.100	1375	1675	2250	2824	3375
0.125	1606	1942	2813	3517	4219
0.160			3306	4455	5386
0.190			3725	4983	6385
0.200				5168	6581
0.250				6038	7636
Head height (ref.), in.	0.043	0.048	0.063	0.070	0.081

a Data supplied by Kaynar Manufacturing Co., Inc.
b Fasteners installed in interference holes (0.003-0.055).
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
e Permanent set at yield load: 4% of the nominal diameter.

MIL-HDBK-5J

8.1.5.2 (g). Static Joint Strength of 100° Flush Shear AISI 431° Hi-Lok Fasteners in Aluminum Alloy Sheet and Plate

Rivet Type	HL 61 Pin (F_su = 125 ksi), HL 70 Collar^b
Sheet and Plate Material	Clad 7075-T6 and T651
Rivet Diameter	3/16	1/4	5/16	3/8
(Nominal Shank Diameter, in.)	(0.190)	(0.250)	(0.312)	(0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.090	2327
0.100	2430	3740
0.125	2695	4080
0.160	3070	4560	6500^c
0.190	3390	4970	7160	9100
0.250	3544	5800	8320	10230
0.312		6140	9590	11390
0.375				12580
0.500				13810
Fastener shear strength^d	3544	6140	9590	13810
	Yield Strength^e, lbs
Sheet or plate thickness, in.:
0.090	1840
0.100	1943	2900
0.125	2195	3240
0.160	2540	3700	4030
0.190	2840	4020	5430	7120
0.250	3110	4870	6590	8500
0.312		5350	7580	9700
0.375			7890	10410
0.500				12070
Head height (max.), in	0.049	0.063	0.077	0.051

a AISI 431 is prohibited from use in Air Force and Navy structure by MIL-STD-1568 and SD-24, respectively, because of its sensitivity to heat treatment. Use of fasteners made of this material in design of military aerospace structures requires the specific approval of the procuring agency.
b Data supplied by Hi-Shear Corporation.
c Yield value is less than 2/3 of the indicated ultimate strength value.
d Fastener shear strength based on areas computed from the indicated nominal shank diameter and $F_{s u}=125 \mathrm{ksi}$ .
e Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (h). Static Joint Strength of 100° Flush Shear Head Alloy Steel Hi-Lok Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HL 719 Pin (F_su = 108 ksi), HL 79 Collar^a
Sheet and Plate Material	7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)^b	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	734^c
0.050	1044	1131
0.063	1384	1565	1813
0.071	1518	1820	2216
0.080	1668	1998	2594	2916
0.090	1764	2193	3015	3532	3724
0.100	1825	2345	3338	4059	4516
0.125	1979	2524	3980	5229	6167
0.160	2195	2774	4350	6347	7928
0.190		2989	4634	6702	9087
0.250		3062	5200	7512	9985
0.312			5300	8146	10870
0.375				8280	11760
Fastener shear strength^d	2281	3062	5300	8280	11930
	Yield Strength^e, lbs
Sheet or plate thickness, in.:
0.040	690
0.050	861	1000
0.063	1086	1261	1664
0.071	1224	1421	1876
0.080	1346	1601	2114	2647
0.090	1478	1771	2378	2978	3578
0.100	1610	1924	2642	3309	3976
0.125	1845	2308	3210	4136	4970
0.160	2022	2583	3920	5124	6362
0.190		2750	4344	5886	7330
0.250		3062	4785	6925	9160
0.312				7496	10130
0.375				8158	10820
Head height (nom.), in.	0.040	0.046	0.060	0.067	0.077

a Data supplied by Hi-Shear Corporation.
b Fasteners installed in interference holes (0.001-0.002).
c Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
d Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=108 \mathrm{ksi}$ .
e Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (i). Static Joint Strength of 100° Flush Shear Head Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HL 11 Pin (F_su = 95 ksi), HL 70 Collar^a
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)	5/32	3/16	1/4	5/16
Fastener Diameter, in. (Nominal Shank Diameter, in.)	(0.164)	(0.190)	(0.250)	(0.312)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	734^b	837^b
0.050	941	1083	1343^b
0.063	1207	1393	1762	2170^b
0.071	1385	1588	2012	2463
0.080	1557	1779	2281	2823
0.090	1775	2050	2594	3193
0.100	1876	2263	2919	3631
0.125	1950	2542	3765	4594
0.160	2007	2660	3970	5890
0.190		2694	4165	6105
0.250			4530	6580
0.312			4660	7050
0.375				7290
Fastener shear strength^c	2007	2694	4660	7290
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.040	674	794
0.050	835	982	1325
0.063	1038	1230	1655	2141
0.071	1130	1355	1813	2338
0.080	1230	1480	2062	2620
0.090	1342	1625	2250	2880
0.100	1440	1750	2470	3420
0.125	1670	2020	2930	3860
0.160	1891	2360	3480	4620
0.190		2560	3840	5150
0.250			4440	6170
0.312			4660	6900
0.375				7290
Head height (nom.), in	0.040	0.046	0.060	0.067

a Data supplied by Hi-Shear Corporation.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (j). Static Joint Strength of 100° Flush Shear Head Ti-6Al-6V-2Sn Fasteners in Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HL 911 Pin (F_su = 108 ksi), HL 70 Collar^a
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter, in. (Nominal Shank Diameter, in.)	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	780^b
0.050	982	1137	1456^b
0.063	1264	1458	1863	2287^b
0.071	1426	1642	2094	2570	3096^b
0.080	1622	1866	2425	2920	3473
0.090	1740	2105	2750	3339	3965
0.100	1794	2310	3063	3777	4415
0.125	1915	2455	3875	4770	5666
0.160	2098	2660	4219	6181	7339
0.190	2252	2840	4450	6483	8788
0.250	2281	3062	4925	7067	9589
0.312			5300	7670	10362
0.375				8280	11079
0.500					11930
Fastener shear strength^c	2281	3062	5300	8280	11930
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.040	734
0.050	882	1044	1394
0.063	1076	1300	1750	2190
0.071	1184	1406	1938	2472	2995
0.080	1320	1540	2188	2774	3332
0.090	1392	1680	2375	3066	3768
0.100	1480	1810	2569	3358	4120
0.125	1700	2085	3031	4010	5019
0.160	1870	2380	3563	4818	6074
0.190	1978	2530	3937	5354	6749
0.250	2178	2740	4375	6269	8183
0.312			4687	6883	9209
0.375				7418	9870
0.500					11039
Head height (nom.), in.	0.040	0.046	0.060	0.067	0.077

a Data supplied by Hi-Shear Corporation.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength based on areas computed from indicated nominal shank diameter and $F_{s u}=108 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (k). Static Joint Strength of 100° Flush Head Ti-6Al-6V-2Sn or Alloy Steel, Shear Type Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	NAS 4452S and KS 100-FV Pins^a (F_su = 108 ksi), NAS 4445DD Nut
Sheet Material	7075-T6
Fastener Diameter, in.	1/8	5/32	3/16	1/4
(Nominal Shank Diameter, in.)	(0.138)	(0.164)	(0.190)	(0.250)
	Ultimate Strength, lbs
Sheet thickness, in.:
0.040	644
0.050	857	976	1065
0.063	1131	1305	1458	1750^b
0.071	1268	1512	1697	2062
0.080	1428	1703	1964	2406
0.090	1499	1910	2227	2794
0.100	1539	2084	2458	3181
0.125	1615	2200	2848	4063
0.160		2281	3036	4900
0.190			3062	5113
0.250				5300
Fastener shear strength^c	1615	2281	3062	5300
	Yield Strength^d, lbs
Sheet thickness, in.:
0.040	609
0.050	766	906	1029
0.063	946	1157	1325	1706
0.071	1044	1278	1505	1956
0.080	1152	1412	1668	2219
0.090	1261	1555	1848	2500
0.100	1320	1694	2014	2762
0.125	1444	1904	2397	3350
0.160		2106	2661	4100
0.190			2845	4419
0.250				4925
Head height (max.), in.	0.037	0.040	0.049	0.063

a Data supplied by Huck Manufacturing Company.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength is documented in NAS 4444.
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (l). Static Joint Strength of 70° Flush Head Straight Shank Ti-6Al-4V Fasteners in Non-Matching Machine-Countersunk Aluminum Alloy Sheet and Plate

Fastener Type	HPT-V^a (F_su= 95 ksi)
Sheet and Plate Material	Clad 7075-T6 and T651
Fastener Diameter (Nominal Shank Diameter, in.)^b	3/16 (0.193)	1/4 (0.255)	5/16 (0.3175)	3/8 (0.380)
Sheet Countersink Angle	82°	82°	82°	75°
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.063	1348
0.071	1546	1970
0.080	1704	2275
0.090	1814	2580	3125
0.100	1948	2873	3528	4100
0.125	2265	3282	4465	5270
0.160	2700	3868	5171	6642
0.190	2779	4361	5826	7393
0.250		4851	7056	8880
0.312			7521	10396
0.375				10774
Fastener shear strength^c	2779	4851	7521	10774
	Yield Strength^d, lbs
Sheet or plate thickness, in.:
0.063	1180
0.071	1378	1651
0.080	1590	1944
0.090	1702	2321	2631
0.100	1818	2620	3024	3350
0.125	2112	3055	4133	4664
0.160	2496	3601	4848	6209
0.190	2734	4062	5413	6902
0.250		4745	6552	8288
0.312			7378	9631
0.375				10584
Head height (max.), in.	0.060		0.080	0.090

a Data supplied by PB Fasteners.
b Fasteners installed in interference holes (0.0045-0.0055).
c Fastener shear strength based on areas computed from the indicated nominal shank diameter and $F_{s u}=95 \mathrm{ksi}$ .
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.

MIL-HDBK-5J

8.1.5.2 (m). Static Joint Strength of 100° Flush Shear Head STA Ti-6Al-4V Fasteners in Machine-Countersunk Aluminum Alloy Sheet

Fastener Type	NAS 4452V Pin (F_su = 95 ksi), NAS 4445D Nut^a
Sheet Material	Clad 7075-T6
Fastener Diameter, in. (Nominal Shank Diameter, in.)	5/32 (0.164)	3/16 (0.190)	1/4 (0.250)	5/16 (0.312)	3/8 (0.375)
	Ultimate Strength, lbs
Sheet or plate thickness, in.:
0.040	766^b
0.050	1092	1173
0.063	1450	1639	1886^b
0.071	1633	1889	2290
0.080	1805	2136	2710	3028
0.090	1955	2368	3135	3651
0.100	2007	2557	3515	4230	4669
0.125		2694	4273	5485	6428
0.160			4660	6776	8426
0.190				7290	9708
0.250					10490
Fastener shear strength^c	2007	2694	4660	7290	10490
	Yield Strength^d, lbs
Sheet thickness, in.:
0.040	712
0.050	891	1034
0.063	1103	1295	1712
0.071	1223	1445	1932
0.080	1349	1604	2169	2715
0.090	1475	1768	2420	3056
0.100	1489	1920	2658	3383	4082
0.125		2241	3196	4145	5072
0.160			3812	5076	6321
0.190				5746	7265
0.250					8802
Head height (max.), in.	0.040	0.049	0.063	0.077	0.091

a Data supplied by Huck Manufacturing Company.
b Values above line are for knife-edge condition and the use of fasteners in this condition is undesirable. The use of knife-edge condition in design of military aircraft requires specific approval of the procuring agency.
c Fastener shear strength is documented in NAS 4444.
d Permanent set at yield load: the greater of 0.012 inch or 4% of nominal diameter.