According to the report, the Brazilian Ministry of Development, Industry and Foreign Trade announced...

- Strength and hardness equivalent to 410, corrosion resistance superior to 304 by appropriate addition of Mo, as well as by control of trace elements. - High anti corrosion (salt spray test exceed 2,000 hours) - High hardness (Hv 580-620) - One piece without welding, drilling performance superior to Bi-Metal screws. - Shiny surface without any chemical treatment or coating, conform to the standard made by European Union to preserve the environment.



- Self-drilling screws - Roofing screws - Tapping screws - Solar panel screws - Marine application screws

Self Drilling Screw,Drywall Screw,Chipboard Screw - Shuangzi,https://www.shuangzimetal.com/