What socket is equivalent to a 13 mm socket?

Answer 1

The "inch" or "fractional" system does not always have an exact fractional equivalent. This is the case for 37mm. The decimal equivalent of 37mm would be approx. 1.457 inches. The closest 1/16th is 1-7/16"

To me, the fractional system is very confusing, nor does it sort well alphanumerically versus size, which is a major flaw as we continue forward in the computer age. The fractional "equivalent" for any millimeter measurement also depends on the tolerance you are looking for (1/16th or 1/64th or 1/1000th, etc.).

Because all of this fraction and conversion stuff is so complicated, and millimeters are usually simple counting numbers, I would suggest you just use millimeters for the best fit.

If you absolutely need a conversion because you are using a mill or lathe that cannot use millimeters, you may wish to upgrade to one that can. If you take some time to work with metric units, you fill find that they are in fact much less complicated overall, and that you can do most jobs faster because of fewer calculations.

Direct Conversion Formula37 mm*

1 in

25.4 mm

=

1.456692913 in or 1 7/16th

Answer 2

A 1 1/2 inch SAE socket is the nearest larger equivalent to 37mm. It's slightly larger but the next smaller size of SAE socket is smaller than 37mm

Answer 3

9/16 inch

Answer 4

Half-inch