Carriage Bolt, Inch, Neck Type Square, Basic Material Stainless Steel, Material Grade 18-8, Fastener Finish NL-19 (SM), Dia. /Thread Size 1/4 In. -20, Fastener Length 4 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), Drill Size 17/64 in, Head Dia. 0.594 in, Head Height 9/64 in, Head Type Carriage, Square Height 0.156 in, Square Width 0.260 in, Tensile Strength 100, 000 psi, For Use With 18-8 Stainless Steel Nuts, Package Quantity 10. This item has been restricted from sale in the following state (s): []