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fj12ryder wrote:0.5625 - 0.551 = 0.0115, not 0.010. It's simple subtraction, taught in grade school.mike-s wrote:fj12ryder wrote:Better check your math, it's wrong.
FWIW, 9/16" is .5625, 14mm is .551, that's .010" difference.
A 9/16 hex head can be 0.541 to 0.562 (tolerance is such that they're smaller than nominal). A 14 mm hex head from .534-.551 (I think, I could only find a JIS B1180 reference and none for DIN or ISO).
So, it's certainly possible for a tight fitting 14 mm wrench/socket to not fit on a 9/16 head. Conversely, a 9/16 tool could be a very sloppy fit on a 14 mm fastener.
Wrong? I don't think so. You'd better check yours, my calculator/converter works fine. 14mm converts to .551, 9/16 converts to .5625. Where is the math error? I was referring to pure numbers, not reference book stuff.
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