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Sems screws with flat washer, spring washer or both:
1. Applications for automobiles, machine equipment, locks, and other.
2. Material: low carbon steel, medium carbon steel, high carbon steel, alloy steel, boron steel, cor-ten steel, brass steel.
3. Standard: IFI, DIN, ISO, BS, AS and JIS.
4. Mechanical property: GR1, GR2, GR5, GR5.1, GR5.2, GR8, GR8.1, GR8.2, CL4.6, CL4.8, CL5.8, CL6.8, CL8.8, CL9.8, CL10.9, CL12.9, and CL14.99.
5. Surface treatment: surface treatment, black oxide, black zinc plated, copper plated, dacromat plated, hot dipped galvanized, mechanical galvanized, nickel plated, oil quenched with black finished, phosphate & oil, ruspert colorful plated, waxed, zinc plated.
6. We execute very strict QC procedures while manufacturing the products. Separately, we can submit you the relevant certificates upon request.
7. Without sacrificing quality, we are able to offer the competitive pricing in your market with our promised best service through strict QC procedures.