Inch, Elevator Bolt, Head Type - Bolts Flat, Steel, Material Grade Grade A, Fastener Finish Plain, Dia. /Thread Size 5/16 In. -18, Fastener Length 2 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), Fastener Industry Standards ASME B 18.5, Fastener Thread Style Partially Threaded, Head Dia. 1.188 in, Head Height 3/32 in, Rockwell Hardness B100, Package Quantity 25