This product is customer's non-standard screw, using high carbon steel wire, cold upsetting molding, heat treatment hardened to 10.9 (HRC32~38 degrees Celsius).
The surface treatment is black zinc plating, black zinc plating is a metal anti-oxidation processing, suitable for hardware products, such as machine, stamping, die casting and other processes.
Dongguan Tiansheng Co., LTD., specializing in the development and production of non-standard fasteners for 12 years.
Welcome to customize your drawings/samples.
