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These ARP chromoly 12-point bolts are specified at 5/16-18 x 1.000 with a black oxide finish. The 12-point head allows compact tool access for fabrication and assembly scenarios where that size and thread are required. Their dimensions and finish are provided for selection when matching fasteners to the application’s mechanical and assembly needs.
ARP 5/16-18 x 1.000 12pt Black Oxide Bolts
