ARP 5/16-18 x 0.750 Black Oxide Bolt, Hex Head, 5-pack

Brand: Automotive Racing Products (ARP)

High-strength ARP bolts are great for installing most accessories. These 180,000 psi tensile strength bolts are made of 8740 chrome moly with a black oxide finish. Pack of 5 bolts includes matching washers.

These bolts have a 5/16-18 UNC thread pitch and 3/4" under-head length, with a fully-threaded shank. The hex head takes a small 3/8" wrench, but has a full-size 5/8" diameter bearing surface. Head measures 0.30" high.

These bolts are a great choice for FF1600 exhaust headers. The reduced hex size may let you slip an open-end wrench behind tight header tubes where a larger wrench won't fit.