| acc. to DIN 3852 – part 1 | acc. to DIN 3852 – part 2 | NPT | |
| Screw-in plug | with taper metric thread acc. to DIN 158 | with taper Whitworth-pipe thread acc. to DIN 3858 | screw-in plug and screw-in hole with taper NPT-thread acc. to ANSI / ASME B 1.20.1 – 1983 |
| Screw-in hole | with cylindric metric thread acc. to DIN 13 | with cylindric Whitworth pipe thread acc. to DIN 3858 |
Dimensions of female screw-in holes
| part 1 | part 2 | NPT | min. b2 | min. t3 |
|---|---|---|---|---|
| M 8 x 1,0 | 5.5 | 10 | ||
| Rp 1/8'' | 5.5 | 9.5 | ||
| M 10 x 1,0 | 5.5 | 10 | ||
| M 12 x 1,0 | Rp 1/4'' | 8.5 | 13.5 | |
| M 14 x 1,5 | 8.5 | 13.5 | ||
| M 16 x 1,5 | Rp 3/8'' | 8.5 | 13.5 | |
| M 18 x 1,5 | 8.5 | 13.5 | ||
| M 20 x 1,5 | Rp 1/2'' | 10.5 | ||
| M 22 x 1,5 | 10.5 | 16.5 | ||
| 1/8'' NPT | 6.9 | 11.6 | ||
| 1/4'' NPT | 10 | 16.4 | ||
| 3/8'' NPT | 10.3 | 17.4 | ||
| 1/2'' NPT | 13.6 | 22.6 | ||
| 3/4'' NPT | 14.1 | 23.1 | ||
| 1'' NPT | 16.8 | 27.8 | ||
| 1 1/4'' NPT | 17.3 | 28.3 | ||
| 1 1/2'' NPT | 17.3 | 28.3 |