Hex Head Cap Screw System of Measurement Inch Basic Material Nylon Material Grade Not Graded Fastener Finish Plain Dia./Thread Size 1/4 In.-20 Fastener Length 1 1/2 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Thread Style Partially Threaded Fastener Industry Standards ANSI/ASME B1.1 1982 Head Type Slotted Hex Min Thread Length 3/4 in Head Height 3/16 in Head Width 7/16 in Package Quantity 10