美制粗牙UNC

美制细牙UNF

螺纹规格

钻头直径（mm)

螺纹规格

钻头直径（mm)

       2-56               0.086-56

2.4

4-48              0.112-48

3.0

     4-40              0.112-40

3.0

6-40              0.138-40

3.8

      5-40                0.125-40

3.4

8-36              0.164-36

4.4

      6-32               0.138-32

3.7

10-32            0.190-32

5.1

     8-32              0.164-32

4.4

1/4"-28

6.6

      10-24             0.190-24

5.1

5/16"-24

8.2

     12-24            0.216-24

5.8

3/8"-24

9.8

1/4"-20

6.7

7/16"-20

11.5

5/16"-18

8.4

1/2"-20

13.1

3/8"-16

9.9

9/16"-18

14.7

7/16"-14

11.6

5/8"-18

16.3

1/2"-13

13.1

3/4"-16

19.5

9/16"-12

14.9

7/8"-14

22.7

5/8"-11

16.6

1"-14

25.9

3/4"-10

19.6

1"-12

26.0

7/8"-9

23.1

1 1/8"-12

29.2

1"-8

26.1

1 1/4"-12

32.4

1 1/8"-7

29.7

1 3/8"-12

35.6

1 1/4"-7

32.8

1 1/2"-12

38.7

1 3/8"-6

36.2

1 1/2"-6

39.4