Brand: Automotive Racing Products (ARP)
These high-strength ARP bolts are great for installing most accessories. The 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 1/4-28 UNF bolts have a 1 1/2" under-head length including the 1/2" long grip (unthreaded portion). The 12-point head takes a small 5/16" wrench, but has a full-size 0.515" diameter bearing surface. Head measures 0.255" high.