Table 8.1.6.2: (b). Static Joint Strength of 100° Reduced Flush Head, Alloy Steel Pin, Aluminum Alloy Sleeve, Fastener 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.	MIL-B-8831/4ª (F_su = 108 ksi)
Sheet Material	Clad 2024-T3
Fastener Diameter, in. (Nominal Hole Diameter, in.)^b,c	3/16 (0.2390)	1/4 (0.3032)	5/16 (0.3695)	3/8 (0.4350)	7/16 (0.5022)	1/2 (0.5735)
Sheet thickness, in.:	Ultimate Strength, lbs.
0.100	2175
0.125	2720	3450	4205
0.160	3290	4415	5380	6335	7315
0.190		5240	6390	7525	8685	9920
0.250		5480	7945	9895	11425	13050
0.312		5655	8165	11085	14260	16285
0.375		5670	8385	11345	14845	19070
0.500			8760	11865	15445	19755
0.625				12385	16045	20440
0.750				12640	16645	21225
0.875					17100	21805
1.000						22250
Rivet shear strength^d	3290	5670	8760	12640	17100	22250
Sheet thickness, in.:	Yield Strength^e, lbs.
0.100	1575
0.125	1880	2505	3200
0.160	2310	3050	3865	4720	5655
0.190		3515	4435	5395	6430	7595
0.250		4450	5570	6735	7980	9360
0.312		5055	6745	8115	9580	11185
0.375		5560	7460	9525	11205	13040
0.500			8680	11010	13655	16720
0.625				12385	15315	18625
0.750				12640	16645	20520
0.875					17100	21805
1.000						22250
Sleeve head height (ref.), in.	0.062	0.075	0.082	0.093	0.115	0.120

a Data supplied by P.B. Fasteners.
b Nominal hole diameter based on ( max. expanded sleeve - min. hole ) + min. hole using larger expanded diameter from 2 MIL-B-8831/4 dated 23 August 1982.
c Fasteners installed to interference levels of 0.002-0.008 in.
d Fastener shear strength is documented in NAS 1724 as 108 ksi.
e Permanent set at yield load: 4% of nominal hole diameter.

MIL-HDBK-5J

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

Last Updated 29 Oct 2026

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Fastener Type.	MIL-B-8831/4ª (F_su = 108 ksi)
Sheet Material	Clad 2024-T3
Fastener Diameter, in. (Nominal Hole Diameter, in.)^b,c	3/16 (0.2390)	1/4 (0.3032)	5/16 (0.3695)	3/8 (0.4350)	7/16 (0.5022)	1/2 (0.5735)
Sheet thickness, in.:	Ultimate Strength, lbs.
0.100	2175
0.125	2720	3450	4205
0.160	3290	4415	5380	6335	7315
0.190		5240	6390	7525	8685	9920
0.250		5480	7945	9895	11425	13050
0.312		5655	8165	11085	14260	16285
0.375		5670	8385	11345	14845	19070
0.500			8760	11865	15445	19755
0.625				12385	16045	20440
0.750				12640	16645	21225
0.875					17100	21805
1.000						22250
Rivet shear strength^d	3290	5670	8760	12640	17100	22250
Sheet thickness, in.:	Yield Strength^e, lbs.
0.100	1575
0.125	1880	2505	3200
0.160	2310	3050	3865	4720	5655
0.190		3515	4435	5395	6430	7595
0.250		4450	5570	6735	7980	9360
0.312		5055	6745	8115	9580	11185
0.375		5560	7460	9525	11205	13040
0.500			8680	11010	13655	16720
0.625				12385	15315	18625
0.750				12640	16645	20520
0.875					17100	21805
1.000						22250
Sleeve head height (ref.), in.	0.062	0.075	0.082	0.093	0.115	0.120

a Data supplied by P.B. Fasteners.
b Nominal hole diameter based on ( max. expanded sleeve - min. hole ) + min. hole using larger expanded diameter from 2 MIL-B-8831/4 dated 23 August 1982.
c Fasteners installed to interference levels of 0.002-0.008 in.
d Fastener shear strength is documented in NAS 1724 as 108 ksi.
e Permanent set at yield load: 4% of nominal hole diameter.