美制管牙絲攻

NPT

NPS

1/16-27

6.25

6.35

1/8-27

8.43

8.74

1/4-18

11.13

11.13

3/8-18

14.28

14.68

1/2-14

17.86

18.26

3/4-14

23.01

23.42

1”-11 1/2

28.98

29.36

1 1/4-11 1/2

37.69

38.10

1 1/2-11 1/2

44.04

44.45

2”-11 1/2

55.96

56.36