Hex Head Cap Screw System of Measurement Inch Basic Material Steel Material Grade Grade 5 Fastener Finish Zinc Plated Dia./Thread Size 1/4 In.-20 Fastener Length 5 1/2 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Thread Style Fully Threaded Fastener Industry Standards ASME B18.2.1 Head Type Hex Head Height 11/64 in Head Width 7/16 in Package Quantity 25