Abrasives & Brushes -90pcs Flat Head Threaded Rivet Nut Insert Assortment Kit Highlights Brand Generic 90pcs Flat Head Threaded Rivet Nut Insert Assortment Kit Description: Made in high quality carbon steel, durable, sturdy, providing high strength and load-bearing threads. Rivet nut insert M3 M4 M5 M6 M8 M10 M12 rivet nut assortment. Easy and convenient to install and use. Suitable for fixed tub, mounting storage containers against the tailgate and anchoring it to the wheel arches. Application: Many types of tough materials including sheet metal, steel, aluminum, plastic, fiberglass, etc. specification: M3 inner diameter about 4.9mm / 0.19in; outer diameter about 8mm / 0.31in; height: about 9mm / 0.35in Inner diameter M4: about 5.9mm / 0.23in; outer diameter: about 9mm / 0.35in; height: about 10mm/0.39in Inner diameter M5 about 6.9mm/0.27in; outer diameter about 10mm/0.39in; height: approx. 13mm / 0.51in Inner diameter M6: approx. 8.9mm / 0.35in; outer diameter about 12mm / 0.47in; height: approx. 15mm / 0.59in Inner diameter M8 Approx. 10.9mm / 0.43in; Outer Diameter Approx 14mm / 0.55in; Height: approx. 18mm / 0.71in Inner Diameter M10 Approx. 12.9mm / 0.51in; Outer diameter Approx. 16mm / 0.63in; Height: approx. 21mm / 0.83in Inner Diameter M12 Approx. 14.9mm / 0.59in; Outer Diameter Approx. 18mm / 0.71in; Height: approx. 24 mm / 0.94 in Package includes: 120-piece package: 50 x M4 rivet nuts, 35 x M5 rivet nuts, 15 x M6 rivet nuts, 10 x M8 rivet nuts, 10 x rivet nuts with M10 rivets. Pack of 180 pieces: 50 x M3 steel rib nuts, 40 x M4 steel rib nuts, 30 M5 steel rib nuts, 25 M6 steel rib nuts, 20 M8 steel rib nuts, 10 M10 steel rib nuts, 5 x M10 steel rib nuts ribbed in M12 steel. Pack of 300 pieces: 90x M3 steel ribbed nuts, 65x M4 steel ribbed nuts, 50x M5 steel ribbed nuts, 40x M6 steel ribbed nuts, 30x M8 steel ribbed nuts, 20x M10 steel ribs, 5x M12 steel rib nuts. Pack of 150 pieces: 40 pieces M4x11mm rivet nuts, 40 pieces M5x13mm, 30 pieces M6x15mm, 20 pieces M8x18mm, 15 pieces M10x21mm, 5 pieces M3x 9mm