Square Nut, System of Measurement Inch, Steel, Machine Screw Square Nut, Fastener Finish Zinc Plated, Fastener Thread Direction Right Hand, Dia. /Thread Size 5/16 In. -18, Fastener Thread Type UNC (Coarse), Width Across Flats 9/16 in, Nut Height 7/32 in, Package Quantity 100. This item has been restricted from sale in the following state (s): []