Inch Elevator Bolt Head Type - Bolts Flat Steel Material Grade Grade A Fastener Finish Plain Dia/Thread Size 5/16 In.-18 Fastener Length 1 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Industry Standards ASME B18.5 Fastener Thread Style Partially Threaded Head Dia 1.188 in Head Height 3/32 in Rockwell Hardness Max B100 Package Quantity 25