Hexagon Socket Head Cap Screw ASME 18.3, plain steel alloy, UNC (comparable with ISO metric thread)
ASME B18.3 steel alloy plain UNC
SCR-HX-SOC-ALLOY-1/2_13X1 1/2
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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)
Nominal diameter (d1) | 1/2 in |
Length (l1) | 1-1/2 in |
Head diameter | 0.750 in |
Head height | 0.500 in |
Internal drive (s1) | HS1/4 inch |
Material | Alloy |
Surface | Plain |
Number of thread starts per inch | 13 |
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