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| 10 mm is .3937". Nothing crosses.
11 mm is .433". 11mm wrench is snug on 7/16" bolt heads, 7/16" should work on 11 mm metric.
12 mm is .472". Nothing crosses except maybe a 15/32" could be a snug fit. 1/2" does not work on 12mm.
13 mm is .511" Half won't fit, 13 doesn't work well on 1/2" all the time.
14 mm is .551" 9/16"may fit loosely.
15 mm is .591" No cross.
16 mm is .630", .005 larger than 5/8" Wrenches should interchange.
17mm is .669". 11/16 will be loose.
18 mm is .708". 23/32 might work.
19mm is .748, .002 smaller than 3/4. Wrenches WILL interchange.
20 mm is .787. .006 larger than 25/32"
21 mm is .827". .014 larger than 13/16. 13/16 won't fit.
22 mm is .866". .008" smaller than 7/8"
23 mm is .905". .001" smaller than 29/32".
24mm is.945". .008" larger than 15/16".
25mm is .984". .015 smaller than 1".
26mm is 1.023". .009" smaller than 1-1/32"
27mm is 1.063". almost exactly 1-1/16"
28mm is 1.102". .023 smaller than 1-1/8".
29mm is 1.141". too big for 1-1/8, about right for 1-5/32"
30 mm is 1.181". .006" smaller than 1-3/16".
31mm is 1.220". .030" smaller than 1-1/4". .001" larger than 1-7/32"
32mm is 1.260" .010" larger than 1-1/4".
33mm is 1.299". .013" smaller than 1-5/16"
Metric to english is metric mm times .03937" By SAE standards sockets and open ends are usually about .010" larger than the hex. Might be more in the inch and larger sizes.
I've had both metric and fractional sets since 1964 and I've found many more metrics work on fractional nuts than fraction work on metric in the sizes under 19mm/3/4" that have been common in my cars.
The different brand would be a handy idea. Mine aren't different. Maybe dunping the metric in blue paint (or some other distinctive color) would separate the sets better. I just read the clear size stamps on mine though at one time each had its own plastic pouch that helped cut the mixing. Plastic hasn't lasted nearly as well as steel.
Gerald J. | |
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question on metric wrenches
