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Hexagon Socket Head Cap Screw

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Hexagon Socket Head Cap Screw

ASME 18.3 steel alloy plain UNC (standard thread)

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Available in 172 versions

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1 INCH (in) = 25, 4 mm


The alloy strength class is comparable with metric strength class 12.9


Socket screws to ASME B 18.3 do not have the strength class marked on the head since, according to ASTM 574, they have only one strength class.



Standard thread tolerance according to ASME B1.1 = 3A (for external thread)