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The ARP 5/16-18 x 3.250 chromoly hex-head bolt in black oxide finish is a longer fastener for fabrication and assembly tasks requiring more thread engagement. With 5/16-18 threads and a 3.250-inch length, it suits medium-duty mounts, braces, and custom fixtures where a chromoly hex-head bolt with black oxide finish and a standard hex drive is needed for tidy, reliable fastening in thicker assemblies.
ARP 5/16-18 X 3.250 hex black oxide bolts
