Carriage Bolt, Inch, Neck Type Square, Basic Material Steel, Material Grade Grade 5, Fastener Finish Chrome Plated, Dia./Thread Size 1/4 In.-20, Fastener Length 1 1/2 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), ASME B18.5, Drill Size 17/64 in, Head Dia. 0.563 in, Head Height 9/64 in, Head Type Round, Square Height 0.125 in, Square Width 0.245 in, Tensile Strength 120,000 psi, For Use With Grade 2 Nuts, Package Quantity 5