Report copyright - · 2015. 12. 1. · D D2 D1 D D2 D1 External Thread External Thread d1 d2 d1 d d2 d1 No.1 64 UNC 0.3969 0.215 1.854 1.598 1.425 72 UNF 0.3528 0.191 1.854 1.626 1.473 No.2 56 UNC
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