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USA Grade Dh Heavy Hex Nut, A563, Hot-Dip Galvanization / Wax & Blue Dye (Inch)
USA-made Heavy Hex Nuts A563 Grade DH Hot-Dip Galvanized with Wax & Blue Dye are premium high-strength fasteners designed for structural steel and heavy-duty construction applications. Manufactured in compliance with ASTM A563 Grade DH specifications, these nuts are produced from heat-treated carbon or alloy steel to deliver superior tensile and proof load strength. The heavy hex design offers a larger bearing surface and greater wrenching strength, while the hot-dip galvanized coating provides outstanding corrosion protection for long-term outdoor performance. The wax and blue dye treatment further enhances lubricity, reduces installation friction, and allows for quick visual identification during assembly.
Proudly made in the USA, A563 Grade DH Heavy Hex Nuts with Hot-Dip Galvanized and Wax & Blue Dye finish are engineered for use with high-strength structural bolts such as ASTM A325 and A490. The combination of galvanization and wax coating ensures consistent torque-tension characteristics and reliable clamping performance under demanding conditions. Commonly used in bridgework, steel structures, and infrastructure projects, these nuts meet ASTM, AISC, and IFI standards for critical bolted connections requiring exceptional strength and corrosion resistance.
