Nut Insert, System of Measurement Inch, Insert Diameter 1/2 in, Overall Length 37/64 in, Thread Size 5/16 In.-18, Thread Type Coarse, Flange Diameter 0.537 in, Material Steel, Finish Zinc Plated, Drill Bit Size 31/64 in, Maximum Hole Diameter 0.516 in, Minimum Material Thickness 0.094 in, Package Quantity 25