1、This rivet nut is made of high quality carbon steel, which has strong rust resistance 2、The surface is plated with color zinc to prevent damage and discoloration, and is more resistant to oxidation 3、Widely used in electrical appliances and industrial products such as automobiles, furniture, decoration, etc. 4、Carbon steel rivet nuts are sorted by size in transparent storage boxes for quick access and protection 5、Rivet nut set is used in the fastening field of various metal plates, pipes and other manufacturing industries Inch Rivet Nut: 50pcs x 6-3230pcs x 8-3225pcs x 10-2425pcs x 10-3220pcs x 1/4-20Metric System Rivet Nut: 50pcs x M340pcs x M430pcs x M520pcs x M610pcs x M8 Item Type: Carbon steel rivet nutProduct Material: Carbon steelSurface Treatment: Color zinc platingProduct Use: It is used in the fastening field of various metal plates, pipes and other manufacturing industries. It is widely used in the assembly of electromechanical and light industrial products such as automobiles, aviation, railways, refrigeration, elevators, switches, instruments, furniture, decoration, etc.The product contains: Inch: 50pcs x 6-32, 30pcs x 8-32, 25pcs x 10-24, 25pcs x 10-32, 20pcs x 1/4-20Metric System: 50pcs x M3, 40pcs x M4, 30pcs x M5, 20pcs x M6, 10pcs x M8