Brand: Automotive Racing Products (ARP)
These high-strength ARP bolts are great for installing most accessories.  The 170,000 psi tensile strength bolts are made of stainless steel with a polished, corrosion-resistant finish.  Pack of 5 bolts includes matching washers.  
These bolts have 7/16-14 UNC coarse threads and a 5" under-head length, including the 3 3/4" long grip (unthreaded portion).  The hex head takes a 1/2" wrench, but has a full-size 3/4" diameter bearing surface.  Head measures 0.345" high.