Carriage Bolt Inch Neck Type Square Basic Material Steel Material Grade Grade A Fastener Finish Zinc Plated Dia/Thread Size 5/8 In.-11 Fastener Length 4 1/2 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) ASME B18.5 Drill Size 5/8 in Head Dia 1.219 in to 1.344 in Head Height 21/64 in Head Type Round Square Height 0.313 in to 0.344 in Square Width 0.616 in to 0.642 in Tensile Strength 74 000 psi For Use With Grade 2 Zinc Nuts Package Quantity 10