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Grade C Heavy Hex Nut, A563, Zinc Cr+3 (Inch)
Heavy Hex Nuts A563 Grade C Zinc Cr+3 are high-strength carbon steel fasteners manufactured to ASTM A563 Grade C specifications. Designed for structural and industrial applications, these heavy-pattern nuts feature larger wrenching flats and increased thickness to provide superior load distribution and torque strength. The Zinc Cr+3 (trivalent chrome) plating delivers excellent corrosion resistance, a bright silver finish, and an environmentally friendly alternative to traditional hexavalent coatings.
Engineered for use with high-strength structural bolts such as ASTM A325 and A490, A563 Grade C Heavy Hex Nuts with Zinc Cr+3 plating ensure dependable performance in construction, bridgework, and heavy equipment assemblies. The Cr+3 coating provides consistent rust protection and a smooth surface for easier installation and removal. Strong, durable, and compliant with ASTM standards, these nuts are ideal for both indoor and moderately corrosive outdoor environments.
