Rivet Nut System of Measurement Inch Insert Diameter 1/2 in Overall Length 39/64 in Thread Size 5/16 In.-18 Thread Type Coarse Flange Diameter 0.528 in Material Steel Material Grade/Class 12L14/1215 Finish Cadmium Plated Body Texture Knurled Compatible Material Metal Drill Bit Size 1/2 in Maximum Hole Diameter 0.5156 in Minimum Material Thickness 0.03 in Maximum Material Thickness 0.187 in Insert Nut Type Rivet Nut Body Type Round Thread Fit 2B Body Length 39/64 in