Hexagon Socket Head Cap Screw with low Head
ASME B18.3 steel alloy plain UNC
SCR-SOC-LOWHD-ALLOY-1/4_20X1/2
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1 INCH (in) = 25.4 mm
The alloy strength class is comparable with metric strength class 12.9
Hexagon socket screws according to ASME B 18.3 are not inscribed with the strength class on the head as these only have the one strength class according to mechanical properties ASTM F835.
Standard thread tolerance according to ASME B1.1 = 3A (for external thread)
Screws have only limited resilience, cf. ASME 18.3 Table 1G and ASTM F835 Table 3, Point A
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