Item Type: Flat Head Threaded Insert Nuts_x000D_ Material: Carbon steel_x000D_ Specification: _x000D_ 50 x M3 Nuts_x000D_ 50 x M4 Nuts_x000D_ 30 x M5 Nuts_x000D_ 20 x M6 Nuts_x000D_ 15 x M8 Nuts_x000D_ Surface Treatment: Galvanized 1The nut is made of carbon steel, the surface is galvanized, strong and durable. 2The knurled nut makes it easier to insert the workpiece and can be easily installed in a variety of materials including steel, plastic and so on. 3There are many specifications of M3, M4, M5, M6, M8, which can meet your different needs. 4There are 165 rivet nuts installation tools to make the work easier and faster. 5Small size, easy to carry and store, convenient to use and with good performance.1 Box Flat Head Threaded Insert Nuts