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 bolts have a 3/8-16 UNC thread pitch and 1" under-head length, with a fully-threaded shank. The hex head takes a 7/16" wrench, but has an oversized 0.70" diameter bearing surface*. Head measures 0.36" high.
* Standard AN960-616 flat washers have a 0.625" OD.