Adopt 1022 high carbon steel wire, cold heading machine forming.
After treatment, it shall be subjected to 8.8 degrees of high-temperature treatment (HRC22~32 Degrees Celsius).
The surface treatment was trivalent blue and white zinc with salt spray up to 96H above.
Dongguan Tiansheng Co., LTD has been specialized in developing and producing non-standard fasteners for 12 years.
You are welcome to customize different head type/length/surface treatment and similar products by drawing/sample.
Class 8.8 High strength cross grooved pan head half-tooth screw
