Features Firm for Fixing: Knurled and threaded design ensures firm screwing in without loosening or slipping, largely improving the connection. 4 Types in Pack: This assortment has 30pcs M6 knurled nut, 30pcs M8 knurled nut, 30pcs M10 knurled nut and 30pcs M12 knurled nut. Practical Using: Widely used in agriculture, aviation, material handling, marine, factory and construction, machinery, hardware, etc. Stainless Steel: Mainly made of premium stainless steel material, the rustproof threaded insert also has high strength for long use. Easy to Install: Light in weight and compact in size as well, the knurled insert enables the easy installation to be easily finished. Specification: Item Type:Rivet Nut Material: 304 Stainless Steel Package List:30 x M6 Nut30 x M8 Nut30 x M10 Nut30 x M12 Nut1 x Storage Box Package List 30 x M6 Nut 30 x M8 Nut 30 x M10 Nut 30 x M12 Nut 1 x Storage Box