Comparison of Screw Surface Treatments: Zinc, Black Oxide, E-Coating and Dacromet

Zinc plating, black oxide, e-coating and Dacromet are the four most common fastener surface treatments. This article helps you choose the right finish for your products.

1. Why Does This Matter?

During fastener selection and application, Comparison of Screw Surface Treatments: Zinc, Black Oxide, E-Coating and Dacromet is a common concern for engineers and buyers. Understanding the relevant knowledge helps improve assembly quality and reduce costs and after-sales risks.

2. Key Points

Materials: choose 304/316 stainless steel, carbon steel or alloy steel based on the environment, balancing corrosion resistance and strength;
Standards: follow GB, DIN, ISO standards; custom sizes available for special needs;
Finishes: zinc plating, black oxide, e-coating and Dacromet affect corrosion resistance and appearance;
Tools: use matching Torx tools to ensure torque transmission and protect the drive.

3. Advice from FASTKING

FASTKING (Zhuhai Jiali Hardware) has 20+ years of experience in torx screw manufacturing. ISO certified, offering machine screws, self-tapping screws, set screws, sems screws, drilling screws and custom fasteners with OEM/ODM support. Contact us for professional solutions.

Comparison of Screw Surface Treatments: Zinc, Black Oxide, E-Coating and Dacromet