Zinc Flake Coated Bolts, Nuts & Washers (ISO 10683 / ASTM F3393)

Engineered for high-performance structural connections, these zinc flake coated fasteners comply with ISO 10683 and ASTM F3393 standards. Unlike traditional electroplating, the zinc flake process deposits a thin, uniform layer of zinc and molybdate in a non-electrolytic bath. This unique application method ensures zero hydrogen absorption, eliminating the risk of hydrogen embrittlement in high-strength steel grades such as 10.9, 12.9, and A490.

Key Features & Benefits

• Chrome-Free & Eco-Friendly: The coating process does not use hexavalent chromium, making it a compliant and environmentally responsible alternative to traditional plating.
• Superior Corrosion Protection: Provides excellent salt spray resistance and long-term protection against rust in harsh industrial and outdoor environments.
• No Hydrogen Embrittlement: Safe for high-tensile fasteners, maintaining material integrity and load-bearing capacity without post-plating baking.
• Thin & Uniform Coating: The flake structure allows for a very thin coating that does not significantly alter the dimensional tolerances of precision fasteners.

Applications

Ideal for heavy construction, bridge engineering, offshore platforms, and automotive chassis components where high strength and corrosion resistance are critical. Suitable for bolts, nuts, and washers made from high-grade alloy steels.