Inch Step Bolt Steel Material Grade A307B Fastener Finish Plain Dia/Thread Size #10-24 Fastener Length 1 1/2 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Industry Standards ASME B18.5 Head Dia 0.625 in to 0.656 in Head Height 7/64 in Square Height 0.094 in to 0.125 in Square Width 0.185 in to 0.199 in Tensile Strength 60 000 psi Package Quantity 50