Hex Head Cap Screw System of Measurement Inch Basic Material Steel Material Grade Grade 8 Fastener Finish Plain Dia./Thread Size 1-1/2 In.-6 Fastener Length 8 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Thread Style Partially Threaded Fastener Industry Standards ASME B18.2.1 Head Type Hex Min Thread Length 3 1/4 in Head Height 15/16 in Head Width 2 1/4 in