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The ARP chromoly bolt is a 7/16-20 x 3.250-inch 12-point black oxide fastener for fabrication and mechanical work. Chromoly material and a 12-point head provide a tight, compact wrenching interface compatible with 12-point sockets. The black oxide finish contributes a uniform dark look and modest corrosion resistance for exposed fastening points.
ARP 7/16-20 x 3.250 12pt black oxide bolts
