Bühne

Thread types

Here you will find an overview of the different thread types:

Metric ISO Thread Specifications
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
PG Thread Specifications
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
NPT Thread Specifications
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
British G Thread Specifications
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