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Socket Conversion Table

When you're working on a vehicle, having the right sockets is not only important to the job, but it’s also vital to the bolts you’re fastening and unfastening. Using SAE sockets on a metric bolt can cause stripping or break the fastener. While you should have a full set of metric and SAE sockets to ensure your tools’ stability and longevity, there are a few instances when you can sub an SAE for a metric socket or vice versa. Below is a table of the commonly accepted changes you can make without worrying about damaging bolts or your sockets.

Socket Conversion Table

SAE

Metric

5/16 in.

8 mm.

3/8 in.

10 mm.

7/16 in.

11 mm.

1/2 in.

12-13 mm.

9/16 in.

14-15 mm.

5/8 in.

16 mm.

11/16 in.

17-18 mm.

3/4 in.

19 mm.

13/16 in.

20-21 mm.

7/8 in.

22-23 mm.

15/16 in.

24 mm.

1 in.

25 mm.

1 1/16 in.

27 mm.

1 1/8 in.

28-29 mm.
Socket Conversion Table (cont.)

SAE

Metric

1 3/16 in.

30 mm.

1 1/4 in.

31-32 mm.

1 5/16 in.

33-34 mm.

1 3/8 in.

35 mm.

1 7/16 in.

36-37 mm.

1 1/2 in.

38 mm.

1 9/16 in.

39-40 mm.

1 5/8 in.

41-42 mm.

1 11/16 in.

43 mm.

1 3/4 in.

44-45 mm.

1 13/16 in.

46 mm.

1 7/8 in.

47-48 mm.

1 15/16 in.

49-50 mm.

2 in.

51 mm.