Most rivet nuts need to go through many steps to make and process, including the surface treatment of the half hex rivet nut .

The surface treatment method can choose oxidation, electro-galvanization, zinc-chromium coating (Dacromet), etc. Electro-galvanizing is implemented according to GB/T 5267.1-2002, and zinc-chromium coating (environmental protection Dacromet) is implemented according to GB/T 5267.2-2002.

For surface treatment requiring a neutral salt spray test of no less than 240 hours for corrosion protection, zinc-chromium coating (environmental protection dacromet) should be preferred; for electro-galvanized high-strength bolts, dehydrogenation treatment must be used.

For grade 12.9 bolts, screws, and studs that require a neutral salt spray test for no less than 240 hours for corrosion protection, zinc-chromium coating (environmental protection dacromet) should be used.

Of course, the surface of the hex rivet nut also needs certain processing.