Carriage Bolt Inch Neck Type Square Basic Material Steel Material Grade Grade 5 Fastener Finish Zinc Plated Dia/Thread Size 3/8 In.-16 Fastener Length 5 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) ASME B18.5 Drill Size 3/8 in Head Dia 0.782 in to 0.844 in Head Height 13/64 in Head Type Round Square Height 0.188 in to 0.219 in Square Width 0.368 in to 0.388 in Tensile Strength 120 000 psi Package Quantity 10