Size

Total length

inch

metric

inch

metric

inch

metric

inch

metric

inch

metric

inch

metric

1/4

6

4 "

100

8 "

200

9 "

230

16 "

400

18 "

460

5/16

8

3/8

10

15/32

12

17/32

14

5/8

16

11/16

18

25/32

20

27/32

22

15/16

24

1

26

1–1/8

28

1–3/13

30

1–1/4

32

1–11/32

34

1–13/32

36

1–1/2

38

INCH

METRIC

INCH

METRIC

1/4

6

8

200

5/16

8

8

200

3/8

10

8

200

7/16

11

8

200

1/2

13

8

200

9/16

14

8

200

5/8

16

8

200

11/16

18

8

200

3/4

19

8

200

13/16

21

8

200

7/8

23

8

200

1

26

8

200