ARP chromoly 5/16-24 x 4.125 12-point black oxide bolt is a single chromoly fastener with a black oxide finish. Its 12-point head fits standard 12-point sockets and helps with access in confined assemblies. Choose this bolt when a 5/16-24 thread and a 4.125-inch length are specified for fabrication, assembly, or repair applications.
ARP 5/16-24 X 4.125 12pt black oxide bolts