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| Metric ISO Thread Specifications | ||||||
|
Size | Pitch(mm) | D1(mm) | D2(mm) | Panel-hole(mm) | |
| M12*1.5 | 1.5 | 12 | 10.13 | 12.2 | ||
| M16*1.5 | 1.5 | 16 | 14.13 | 16.2 | ||
| M20*1.5 | 1.5 | 20 | 18.13 | 20.2 | ||
| M25*1.5 | 1.5 | 25 | 23.13 | 25.2 | ||
| M32*1.5 | 1.5 | 32 | 30.13 | 32.2 | ||
| M40*1.5 | 1.5 | 40 | 38.13 | 40.2 | ||
| M50*1.5 | 1.5 | 50 | 48.13 | 50.2 | ||
| M63*1.5 | 1.5 | 63 | 61.13 | 63.2 | ||
| PG Thread Specification | ||||||
|
Size | Pitch(mm) | D1(mm) | D2(mm) | Panel-hole(mm) | |
| PG7 | 1.27 | 12.5 | 11.28 | 12.7 | ||
| PG9 | 1.41 | 15.2 | 13.86 | 15.4 | ||
| PG11 | 1.41 | 18.6 | 17.26 | 18.8 | ||
| PG13.5 | 1.41 | 20.4 | 19.06 | 20.7 | ||
| PG16 | 1.41 | 22.5 | 21.16 | 22.8 | ||
| PG21 | 1.588 | 28.3 | 26.78 | 28.6 | ||
| PG29 | 1.588 | 37.0 | 35.48 | 37.4 | ||
| PG36 | 1.588 | 47.0 | 45.48 | 47.5 | ||
| PG42 | 1.588 | 54.0 | 52.48 | 54.5 | ||
| PG48 | 1.588 | 59.3 | 57.78 | 59.8 | ||
| NPT Thread Specification | ||||||
|
Size | Pitch(mm) | D1(mm) | Of pitches(n) | Panel-hole(mm) | |
| NPT1/4'' | 1.411 | 13.716 | 18 | |||
| NPT3/8'' | 1.411 | 17.145 | 18 | |||
| NPT1/2'' | 1.814 | 21.336 | 14 | |||
| NPT3/4'' | 1.814 | 26.67 | 14 | |||
| NPT1'' | 2.208 | 33.4 | 11 1/2 | |||
| NPT1 1/4'' | 2.208 | 42.164 | 11 1/2 | |||
| NPT1 1/2'' | 2.208 | 48.26 | 11 1/2 | |||
| NPT2'' | 2.208 | 60.325 | 11 1/2 | |||
| British G Thread Specification | ||||||
|
Size | Pitch(mm) | D1(mm) | D2(mm) | Panel-hole(mm) | |
| G1/4'' | 1.337 | 13.157 | 11.145 | 13.4 | ||
| G3/8'' | 1.337 | 16.662 | 14.950 | 17.0 | ||
| G1/2'' | 1.814 | 20.995 | 18.631 | 21.3 | ||
| G3/4'' | 2.309 | 26.441 | 24.117 | 26.8 | ||
| G1'' | 2.309 | 33.249 | 30.291 | 33.7 | ||
| G1 1/4'' | 2.309 | 41.910 | 38.952 | 42.4 | ||
| G1 1/2'' | 2.309 | 47.803 | 44.845 | 48.3 | ||
| G2'' | 2.309 | 59.614 | 56.656 | 60.2 | ||
