英制粗牙（BSW）钢丝螺套参数

英制粗牙（BSW）钢丝螺套参数

英制规格

转换为公制规格

公制规格

公称长度

自由状态圈数

钻头直径

自由状态外径

kXd

mm

N

mm

mm

1/4-20

6.35X1.270

1d

6.4

3.4

6.8

8.00~8.35

1.5d

9.5

6.2

2d

12.7

8.6

5/16-18

7.94X1.411

1d

7.9

4.0

8.4

9.70~10.10

1.5d

11.9

6.6

2d

15.9

9.3

3/8-16

9.52X1.588

1d

9.5

4.8

10.1

11.50~11.90

1.5d

14.3

7.7

2d

19.1

10.6

7/16-14

11.11X1.814

1d

11.1

4.9

11.7

13.40~13.85

1.5d

16.7

7.9

2d

22.2

10.7

1/2-12

12.70X2.117

1d

12.7

4.5

13.2

15.20~15.60

1.5d

19.1

7.4

2d

25.4

10.2

9/16-12

14.29X2.117

1d

14.3

5.1

15

17.00~17.40

1.5d

21.5

8.3

2d

28.6

11.5

5/8-11

15.87X2.309

1d

15.9

5.3

16.6

18.90~19.30

1.5d

23.8

8.5

2d

31.9

11.8

3/4-10

19.05X2.540

1d

19.1

5.9

19.8

22.40~22.80

1.5d

9.5

9.5

2d

13.0

13.0

7/8-9

22.226X2.822

1d

22.2

6.3

23.00

26.00~26.40

1.5d

33.3

10.0

2d

44.5

13.8

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