(Clause 9.1)
All dimensions in millimetres.

Figure description:
- Type: Technical cross-section diagram.
- Key Dimensions:
- D: Outer diameter or larger vertical dimension.
- d: Inner diameter or smaller vertical dimension.
- Units: Millimetres (mm.
- Features:
- Hatched region indicating solid material.
- Wavy lines on the left and bottom indicating a partial or truncated view.
- A vertical line suggesting an internal step or component interface.

Figure description:
- Subject: Internal parallel threads technical diagram.
- Key Specification: Taper 1 in 16 on diameter.
- Dimension Label: "E" indicates a specific diameter measurement.
- Visual Details: Cross-hatched section representing the material wall; dashed line indicating an internal boundary or axis.
INTERNAL PARALLEL THREADS
EXTERNAL TAPER THREADS | Sl No.: (1)=i) | Nominal Size of Outlet: (2)=6 | Minimum Outside Diameter: D (3)=15 | Minimum Outside Diameter of Body Behind External Thread: E (4)=9.8 | Maximum Inside Diameter of Body Behind Internal Thread: d (5)=8.6 | Sl No.: (1)=ii) | Nominal Size of Outlet: (2)=8 | Minimum Outside Diameter: D (3)=18.5 | Minimum Outside Diameter of Body Behind External Thread: E (4)=13.3 | Maximum Inside Diameter of Body Behind Internal Thread: d (5)=11.4 | Sl No.: (1)=iii) | Nominal Size of Outlet: (2)=10 | Minimum Outside Diameter: D (3)=22 | Minimum Outside Diameter of Body Behind External Thread: E (4)=16.8 | Maximum Inside Diameter of Body Behind Internal Thread: d (5)=15.0 | Sl No.: (1)=iv) | Nominal Size of Outlet: (2)=15 | Minimum Outside Diameter: D (3)=27 | Minimum Outside Diameter of Body Behind External Thread: E (4)=21.1 | Maximum Inside Diameter of Body Behind Internal Thread: d (5)=18.6 | Sl No.: (1)=v) | Nominal Size of Outlet: (2)=20 | Minimum Outside Diameter: D (3)=32.5 | Minimum Outside Diameter of Body Behind External Thread: E (4)=26.6
| (1) | (2) | D (3) | E (4) | d (5) | |
|---|---|---|---|---|---|
| Sl No. | i) | ||||
| Nominal Size of Outlet | 6 | ||||
| Minimum Outside Diameter | 15 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 9.8 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 8.6 | ||||
| Sl No. | ii) | ||||
| Nominal Size of Outlet | 8 | ||||
| Minimum Outside Diameter | 18.5 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 13.3 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 11.4 | ||||
| Sl No. | iii) | ||||
| Nominal Size of Outlet | 10 | ||||
| Minimum Outside Diameter | 22 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 16.8 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 15.0 | ||||
| Sl No. | iv) | ||||
| Nominal Size of Outlet | 15 | ||||
| Minimum Outside Diameter | 27 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 21.1 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 18.6 | ||||
| Sl No. | v) | ||||
| Nominal Size of Outlet | 20 | ||||
| Minimum Outside Diameter | 32.5 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 26.6 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 24.1 | ||||
| Sl No. | vi) | ||||
| Nominal Size of Outlet | 25 | ||||
| Minimum Outside Diameter | 39.5 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 33.4 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 30.3 | ||||
| Sl No. | vii) | ||||
| Nominal Size of Outlet | 32 | ||||
| Minimum Outside Diameter | 49 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 42.1 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 39.0 | ||||
| Sl No. | viii) | ||||
| Nominal Size of Outlet | 40 | ||||
| Minimum Outside Diameter | 56 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 48.0 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 44.8 | ||||
| Sl No. | ix) | ||||
| Nominal Size of Outlet | 50 | ||||
| Minimum Outside Diameter | 68 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 59.8 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 56.7 | ||||
| Sl No. | x) | ||||
| Nominal Size of Outlet | 65 | ||||
| Minimum Outside Diameter | 84 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 75.4 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 72.2 | ||||
| Sl No. | xi) | ||||
| Nominal Size of Outlet | 80 | ||||
| Minimum Outside Diameter | 98 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 88.1 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 84.9 | ||||
| Sl No. | xii) | ||||
| Nominal Size of Outlet | 100 | ||||
| Minimum Outside Diameter | 124 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 113.3 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 110.1 | ||||
| Sl No. | xiii) | ||||
| Nominal Size of Outlet | 125 | ||||
| Minimum Outside Diameter | 151 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 138.7 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 135.5 | ||||
| Sl No. | xiv) | ||||
| Nominal Size of Outlet | 150 | ||||
| Minimum Outside Diameter | 178 | ||||
| Minimum Outside Diameter of Body Behind External Thread | 164.1 | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | 160.9 | ||||
| Sl No. | NOTE — For particular of threads, see IS 554. | ||||
| Nominal Size of Outlet | NOTE — For particular of threads, see IS 554. | ||||
| Minimum Outside Diameter | NOTE — For particular of threads, see IS 554. | ||||
| Minimum Outside Diameter of Body Behind External Thread | NOTE — For particular of threads, see IS 554. | ||||
| Maximum Inside Diameter of Body Behind Internal Thread | NOTE — For particular of threads, see IS 554. |