Well Nut, System of Measurement Inch, Insert Diameter 5/8 in, Overall Length 23/32 in, Thread Size 5/16 In.-18, Thread Type Coarse, Flange Diameter 0.875 in, Material Rubber, Finish Plain, Maximum Hole Diameter 0.625 in, Minimum Material Thickness 0.015 in, Maximum Material Thickness 0.156 in, Insert Nut Type Well Nut, Package Quantity 5