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ARP chromoly hex bolt, 5/16-18 x 4.000, finished in black oxide. This chromoly fastener is intended for fabrication and assembly uses requiring a 5/16-18 thread and a 4.000 inch length. The hex head accepts standard wrenches for tightening during repairs or custom builds, and the black oxide finish provides a consistent, low-reflective surface for visible joints.
ARP 5/16-18 X 4.000 hex black oxide bolts
