5/16-18 x 3 1/2 ARP 6 Point High Strength Polished Stainless Steel Bolt

This bolt has a .630 diameter flange and a 3/8 6 point head. ARP grade 8 stainless bolts, studs, and nuts are virtually impervious to rust and corrosion. Rated at 170,000 psi makes these stronger than regular grade 8 fasteners. These are maintenance free fasteners and come with a polished finish.