Description:The rivet nuts don't need for tapping the internal threads welding the nut, while they are firm, highly efficient, convenient.These nuts have galvanized surface that can prevent surface damage and fading, and is resistant to oxidation. The smooth and burr-free surface is sturdy and durable to use.Using high-quality carbon steel material, this nuts kit is sturdy and durable.The storage box is 12.5cm long, 6.5cm wide and 2.2cm high.It is widely used in the assembly of electromechanical and light industrial products such as automobiles, aviation, railways, refrigeration, elevators, switches, instruments, furniture, decorations, etc.Item Name: Rivet NutsMaterial:Carbon SteelSpecification: M3-M8 Flat Head Vertical ThreadSurface Treatment: Zinc PlatingSize:12.5cmx6.5cmx2.2cm/4.92inx2.56inx0.87inNotes:The quantity is about 100pcs, due to manual calculation, the quantity might has 1-3pcs more or less, hope you can understand, thank you.Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.Package Includes:10 X M8 Rivet Nuts10 X M6 Rivet Nuts20 X M5 Rivet Nuts30 X M4 Rivet Nuts30 X M3 Rivet Nuts