Here you will find an overview of the different thread types:
Size | Pitch (S) mm | Outside-Ø D1 mm | Inside-Ø D2 mm | Through hole mm |
M 12 x 1,5 | 1,5 | 12 | 10,38 | 12,2 |
M 16 x 1,5 | 1,5 | 16 | 14,38 | 16,2 |
M 20 x 1,5 | 1,5 | 20 | 18,38 | 20,2 |
M 25 x 1,5 | 1,5 | 25 | 23,38 | 25,2 |
M 32 x 1,5 | 1,5 | 32 | 30,38 | 32,2 |
M 40 x 1,5 | 1,5 | 40 | 38,38 | 40,2 |
M 50 x 1,5 | 1,5 | 50 | 48,38 | 50,2 |
M 63 x 1,5 | 1,5 | 63 | 61,38 | 63,2 |
Size | Pitch (S) mm | Outside-Ø D1 mm | Inside-Ø D2 mm | Through hole mm |
PG 7 | 1,27 | 12,5 | 11,28 | 12,7 |
PG 9 | 1,41 | 15,2 | 13,86 | 15,4 |
PG 11 | 1,41 | 18,6 | 17,26 | 18,8 |
PG 13,5 | 1,41 | 20,4 | 19,06 | 20,7 |
PG 16 | 1,41 | 22,5 | 21,16 | 22,8 |
PG 21 | 1,588 | 28,3 | 26,78 | 28,6 |
PG 29 | 1,588 | 37 | 35,48 | 37,4 |
PG 36 | 1,588 | 47 | 45,48 | 47,5 |
PG 42 | 1,588 | 54 | 52,48 | 54,5 |
PG 48 | 1,588 | 59,3 | 57,78 | 59,8 |
Size | Pitch (S) mm | Outside-Ø mm | Number of Pitches n |
NPT 1/4" | 1,411 | 13,716 | 18 |
NPT 3/8" | 1,411 | 17,145 | 18 |
NPT 1/2" | 1,814 | 21,336 | 14 |
NPT 3/4" | 1,814 | 26,67 | 14 |
NPT 1" | 2,208 | 33,4 | 11 1/2 |
NPT 1 1/4" | 2,208 | 42,164 | 11 1/2 |
NPT 1 1/2" | 2,208 | 48,26 | 11 1/2 |
NPT 2" | 2,208 | 60,325 | 11 1/2 |
NPT 2 1/2" | 3,175 | 73,025 | 8 |
NPT 3" | 3,175 | 88,9 | 8 |
NPT 3 1/2" | 3,175 | 101,6 | 8 |
Size | Pitch (S) mm | Outside-Ø D1 mm | Inside-Ø D2 mm | Through hole mm |
G 1/4" | 1,337 | 13,157 | 11,445 | 13,4 |
G 3/8" | 1,337 | 16,662 | 14,95 | 17 |
G 1/2" | 1,814 | 20,955 | 18,631 | 21,3 |
G 5/8" | 1,814 | 26,441 | 24,117 | 26,8 |
G 1" | 2,309 | 33,249 | 30,291 | 33,7 |
G 1 1/4" | 2,309 | 41,91 | 38,952 | 42,4 |
G 1 1/2" | 2,309 | 47,803 | 44,845 | 48,3 |
G 2" | 2,309 | 59,614 | 56,656 | 60,2 |
G 2 1/2" | 2,309 | 75,184 | 72,226 | 75,7 |
G 3" | 2,309 | 87,884 | 84,926 | 88,5 |
G 3 1/2" | 2,309 | 100,33 | 97,372 | 101 |
G 4" | 2,309 | 113,03 | 110,072 | 114 |