Hexagonal head designed for use with a wrench or socket. These are also referred to as hex cap bolts, hex bolts, tap bolts, or hex cap screws. Grade 8 yellow zinc-plated fasteners are heat-treated and hardened, resulting in it being stronger and more durable. The tensile strength of grade 8 is a minimum of 150,000 psi.
5/16-18″ Grade 9 Hex Flange Top Lock Nut (Non-serrated) COARSE – YELLOW ZINC
$0.30
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