Rivet Nut System of Measurement Metric Insert Diameter 13.5 mm Overall Length 20.5 mm Installed Length 10.8 mm Thread Size M8-1.25 Thread Direction Right Hand Thread Type Coarse Flange Diameter 17.4 mm Flange Thickness 0.89 mm Material Aluminum Material Grade/Class 5056 Finish Plain Body Texture Knurled Compatible Material Metal Drill Bit Size 13.5 mm Maximum Hole Diameter 13.5 mm Minimum Material Thickness 3.8 mm Maximum Material Thickness 7.9 mm Insert Nut Type Rivet Nut