Rivet Nut System of Measurement Inch Insert Diameter 3/8 in Overall Length 33/64 in Installed Length 9/32 in Thread Size 1/4 In.-28 Thread Direction Right Hand Thread Type Fine Flange Diameter 0.4 in Flange Thickness Not Applicable Material Aluminum Material Grade/Class Class 3 Finish Cadmium Plated Body Texture Knurled Compatible Material Metal Drill Bit Size 1/4 in 25/64 in 3/8 in W Maximum Hole Diameter 0.374 in