Rivet Nut System of Measurement Metric Insert Diameter 13.5 mm Overall Length 18.1 mm Installed Length 11.94 mm Thread Size M8-1.25 Thread Direction Right Hand Thread Type Coarse Flange Diameter 15.1 mm Flange Thickness 0.55 mm Material Steel Material Grade/Class 1010/1008 Finish Zinc Yellow Body Texture Knurled Compatible Material Metal Drill Bit Size 13.5 mm Maximum Hole Diameter 13.5 mm Minimum Material Thickness 0.7 mm Maximum Material Thickness 3.8 mm