Carriage Bolt Inch Neck Type Square Basic Material Steel Material Grade Grade 5 Fastener Finish Plain Dia/Thread Size 1/2 In.-13 Fastener Length 5 1/2 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) ASME B18.5 SAE J429 Drill Size 33/64 in Head Dia 1.094 in Head Height 17/64 in Head Type Round Square Height 0.281 in Square Width 0.515 in Tensile Strength 120 000 psi For Use With Grade 5 Hex Nuts Package Quantity 10