Inch Step Bolt Steel Material Grade A307B Fastener Finish Plain Dia/Thread Size 1/4 In.-20 Fastener Length 1 1/4 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Industry Standards ASME B18.5 Head Dia 0.813 in to 0.844 in Head Height 9/64 in Square Height 0.125 in to 0.156 in Square Width 0.245 in to 0.260 in Tensile Strength 60 000 psi Package Quantity 50