Features 1、[SPECIFICATIONS] Including 250pcs rivet nuts, with M3 M4 M5 M6 M8 M10 threads, sufficient in quantity, easy to use and replace. 2、[304 STAINLESS STEEL] Made of excellent 304 stainless steel, resistant to high and low temperature and abrasion, not easy to deform. 3、[FINE PROCESSING] The rivet nut is knurled, with deep thread and even inclination, and the surface is smooth without burrs. 4、[EASY OPERATION] The rivet nut is easier to insert into the workpiece, suitable for machinery, bar equipment, steel pipe connectors, etc. 5、[APPLICABLE MATERIAL] Can be easily installed into many different types of materials, including steel, plastic, fiberglass, etc. Specification Item Type: Rivet Nut Rivet Nut Model: M3 x 9mm; M4 x 11mm; M5 x 13mm; M6 x 15mm; M8 x 18mm; M10 x 21mm Material: 304 Stainless Steel Product Model M3 M4 M5 M6 M8 M10 Thread Diameter 3mm / 0.12in 4mm / 0.16in 5mm / 0.2in 6mm / 0.24in 8mm / 0.31in 10mm / 0.39in Thread Pitch 0.5mm / 0.02in 0.7mm / 0.03in 0.8mm / 0.03in 1mm / 0.04in 1.25mm / 0.05in 1.50mm / 0.06in Flange Height 0.9mm / 0.04in 1mm / 0.04in 1mm / 0.04in 1.5mm / 0.06in 1.5mm / 0.06in 2mm / 0.08in Flange Diameter 7.5mm / 0.3in 9mm / 0.35in 10mm / 0.39in 13mm / 0.51in 16mm / 0.63in 19mm / 0.75in Recommended Aperture 5mm / 0.2in 6mm / 0.24in 7mm / 0.28in 9mm / 0.35in 11mm / 0.43in 13mm / 0.51in Full Length 9mm / 0.35in 11mm / 0.43in 13mm / 0.51in 15mm / 0.59in 18mm / 0.71in 21mm / 0.83in Package List 75 x M3x9mm Rivet Nut 55 x M4x11mm Rivet Nut 50 x M5x13mm Rivet Nut 40 x M6x15mm Rivet Nut 20 x M8x18mm Rivet Nut 10 x M10x21mm Rivet Nut