Grade Eight Hex Head Cap Screws is Made from 4140 steel, these screws
meet ASTM A-354 BD, SAE J-429 Grade 8, and SAE chemistry and mechanical
specifications. Available in coarse and fine thread, with zinc or black oil
finish (class 2A threads). Stocked in diameters from 1/4" to 3" and
lengths up to 30". Head markings for grade 8 bolts is most commonly 6
lines in some arrangement. See common head markings for hex bolt grade
differences.
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