5/16 in X 2 in Hex Grade 8 Cap Screw Bolt

Grade 8 Hex Cap Screws are manufactured from medium carbon alloy steel & heat-treated. They are an externally threaded mechanical device 1/4" diameter or larger, with a trimmed hex head and a washer face on the bearing surface. Grade 8 Hex Cap Screws have greater tensile strength than a Grade 5 Hex Cap Screw and are designed for use in high-stress applications.