5-40Pcs Rivet Nut 8#-32,10#-24,1/4"-20,5/16"-18,3/8"-16,1/2"-13 Carbon Steel Flat Head Rivnut Threaded Insert Nut,Knurled Body,Zinc Plated Finish.【Rivet nuts】-8#-32(40 pcs),10#-24(40 pcs),1/4"-20(30 pcs),5/16"-18(20 pcs),3/8"-16(10 pcs),1/2"-13(5 pcs)。6 assorted sizes of regular rivet nuts, giving you a wide variety of choices.【High-Quality】-The rivet nuts is product of high-quality carbon carbon steel, high strength, nice toughness, and a layer of zinc plated on the surface of the rivet nut can not solely make stronger the anti-rust properties, but also boost its corrosion resistance, thus prolonging the carrier life.【Wide Application】-Rivet nuts are widely used in furniture, domestic appliances, air conditioning, health equipment, bicycles, electric equipment, automobile manufacturing, shipbuilding, aviation and many different production and manufacturing fields.