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weight Measurements Converter

William Tools Standard

 

William Tools Standard
Dimension of Drive Test Load Min. (NM) Material of Body Material of Drive Hardness of Body Hardness of Drive Width of Drive
(mm)
1/4" Dr. 78 Cr-V steel Cr-Mo steel Hrc40~45 Hrc48~52 6.27~6.35
3/8" Dr. 256 Cr-V steel Cr-Mo steel Hrc40~45 Hrc48~52 9.45~9.52
1/2" Dr. 646 Cr-V steel Cr-Mo steel Hrc40~45 Hrc48~52 12.60~12.70

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