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Sharp "V" Thread

Specifications of International Thread Standards

       Used in the U.S.A. until 1909.
Thread Size Nominal
Diameter
mm
Tapping
Drill Size
mm
TPI Pitch
mm
1/4" 6,35 4,15 20 1,27
5/16" 7,94 5,50 18 1,41
3/8" 9,52 6,78 16 1,59
7/16" 11,11 7,97 14 1,81
1/2" 12,70 9,04 12 2,12
9/16" 14,29 10,63 12 2,12
5/8" 15,87 11,87 11 2,31
11/16" 17,46 13,46 11 2,31
3/4" 19,05 14,65 10 2,54
13/16" 20,64 16,24 10 2,54
7/8" 22,22 17,34 9 2,82
15/16" 23,81 18,93 9 2,82
1" 25,40 19,90 8 3,17
1 1/8" 28,57 22,29 7 3,63
1 1/4" 31,75 25,47 7 3,63
1 3/8" 34,92 27,58 6 4,23
1 1/2" 38,10 30,76 6 4,23
1 5/8" 41,27 32,47 5 5,08
1 3/4" 44,45 35,65 5 5,08
1 7/8" 47,62 37,84 4 1/2 5,64
2" 50,80 41,02 4 1/2 5,64
2 1/8" 53,97 44,19 4 1/2 5,64
2 1/4" 57,15 47,37 4 1/2 5,64
2 3/8" 60,32 50,54 4 1/2 5,64
2 1/2" 63,50 52,50 4 5,64
2 5/8" 66,67 55,67 4 5,64
2 3/4" 69,85 58,85 4 5,64
2 7/8" 73,02 62,04 4 5,64
3" 76,20 63,64 3 1/2 7,26
3 1/8" 79,37 66,81 3 1/2 7,26
3 1/4" 82,55 69,99 3 1/2 7,26
3 3/8" 85,72 72,18 3 1/2 7,82
3 1/2" 88,90 73,36 3 1/2 7,82
3 5/8" 92,07 78,53 3 1/2 7,82
3 3/4" 95,25 80,59 3 8,47
3 7/8" 98,42 83,76 3 8,47
4" 101,60 86,94 3 8,47

Sharp V Thread
 
© 1998 Conex Metals.

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