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Screw with flattened half-round head with hexagon socket, inch ASME B18.3, black-oxide 18-8 stainless steel, low head
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1 inch (in) = 25.4 mm
The "alloy" strength class is comparable to metric strength class 12.9
Hexagon socket screws in accordance with ASME B 18.3 do not have the strength class specified on the head, as they have only one strength class in accordance with ASTM F835 mechanical properties.
Standard thread tolerance in accordance with ASME B1.1 = 3A (for external thread)
Screws only suitable for limited loading, see also ASME 18.3 Table 3 and ASTM F835 Table 3 Point A
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