Well Nut, System of Measurement Inch, Insert Diameter 5/16 in, Overall Length 1/2 in, Thread Size #8-32, Thread Type Coarse, Flange Diameter 0.4375 in, Material Rubber, Finish Plain, Maximum Hole Diameter 0.312 in, Minimum Material Thickness 0.015 in, Maximum Material Thickness 0.156 in, Insert Nut Type Well Nut, Package Quantity 25