Tools: Wrenches

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Here is a list of wrench sizes in metric and SAE: http://www.sawmillcreek.org/showthread.php?237613-Imperial-or-metric&p=2499986#post2499986

Metric to SAE wrench sizes. 6.5mm is common in many wrench sets. A 't' next to the wrench size indicates this wrench will be tight on its equivilent size nut, i.e. a 14mm wrench is snug on a 9/16 nut.

Sortable table
Millimeters Inch Inch (as millimeters) Notes
3t 1/8 3.1875 mm
4 5/32 3.96875 mm
3/16 4.7625 mm
5 13/64 5.159375 mm
5.5 7/32 5.55625 mm
6 15/64 5.953125 mm
6.5 1/4t 6.35 mm
7 N/A
8 5/16 7.9375 mm
9 11/32t 8.73125 mm
3/8 9.525 mm No metric equivalent
10 N/A
11t 7/16 11.1125 mm
12 N/A
13 1/2t 12.7 mm
14t 9/16 14.2875 mm
15 19/32 15.08125 mm Imperial measure not common
16 5/8 15.875mm
17 N/A
11/16 17.4625 mm No metric equivalent
18 N/A
19 3/4 This is such a perfect match, it is used internationally for automobile wheel nuts
20 N/A
21 N/A
22t 7/8 22.225 mm
15/16 23.8125 mm No metric equivalent
32 1 ¼ 31.75 mm If memory serves me well, this is the size of the hub nut on the rear axle of Volkswagens before '68 or so.