Hex Head ; 1/4, 0.2500. 5/16, 0.3125. 10 9, 0.260 0.324, 0.237 0.298, 7/16 1/2 ; 3/8, 0.3750. 7/16, 0.4375. 1/2, 0.5000. 7 7 6, 0.388 0.452 0.515, 0.360 0.421
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