Basic fastener production procedure

Basic fastener production procedure




1.Wire - Uncoiled, straightened and cut to length.                                
2.Cold forging - Molding the steel into the right shape at room temperature.                                
3.Bolt head - Progressively formed by forcing the steel into various dies at high pressure.                                
4.Threading - Threads are formed by rolling or cutting.                                
5.Heat treatment - The bolt is exposed to extreme heat to harden steel.                                
6.Surface treatment - It depends on the application. Zinc-plating is common to increase corrosion resistance.                                
7.Packing/stocking - After quality control to ensure uniformity and consistency, the bolts are packaged.