Carriage Bolt Inch Neck Type Square Basic Material Steel Material Grade Grade 5 Fastener Finish Zinc Plated Dia/Thread Size 5/16 In.-18 Fastener Length 1 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) ASME B18.5 Rib Length 1 in Drill Size 5/16 in Head Dia 11/16 in Head Height 11/64 in Head Type Carriage Square Height 0.187 in Square Width 0.313 in Tensile Strength 120 000 psi For Use With SNAPLOCS E-Track Strap Anchors