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ARP chromoly 5/16-18 x 4.750 12-point black oxide bolt is a chromoly-threaded fastener finished in black oxide to reduce surface reflectivity. The 12-point head provides multiple socket engagement angles for compact access, and the specified 5/16-18 x 4.750 length fits general fabrication and assembly tasks where a reliable chromoly bolt is called for.
ARP 5/16-18 x 4.750 12pt black oxide bolts
