The product is made of carbon steel by cold heading.

The surface is dacromet coating, salt spray up to 1200H without red rust.
DACROMET is the abbreviation for DACROMET, DACROMET, DACROMET, DACROMET, DACROMET.
Zinc chromium coating is a new anticorrosive coating based on zinc powder, aluminum powder, chromic acid and deionized water.

Tiansheng professional non-standard customized fasteners for 12 years, can be customized by drawing/sample.