Carriage Bolt Inch Neck Type Square Basic Material Stainless Steel Material Grade 18-8 Fastener Finish Plain Dia/Thread Size 1/4 In.-20 Fastener Length 5/8 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) ANSI/ASME B18.5 Drill Size 17/64 in Head Dia 0.594 in Head Height 9/64 in Head Type Round Square Height 0.125 in Square Width 0.245 in Tensile Strength 100 000 psi For Use With 18-8 Stainless Steel Nuts Package Quantity 100