Product Details

Our DIN 6921 Hex Flange Bolts are distinguished by their robust Hot Dip Galvanized (HDG) coating. This is not a simple plating; it is a metallurgical process where the entire carbon steel bolt is immersed in a bath of molten zinc. This creates a thick, multi-layered coating of zinc-iron alloy and pure zinc that is metallurgically bonded to the steel substrate. The resulting finish is exceptionally durable, abrasion-resistant, and provides superior cathodic (sacrificial) protection, meaning it will corrode preferentially to protect the underlying steel, even if scratched.

These bolts are typically fully threaded, offering maximum engagement and adjustability for a wide range of clamping thicknesses. Due to the substantial thickness of the HDG coating, the threads are manufactured to specific tolerances. It is essential to use them with corresponding hot-dip galvanized nuts that have been tapped oversize to ensure a proper, non-binding fit. The integrated flange eliminates the need for a separate washer, simplifying assembly and providing a broad bearing surface to prevent pull-through and distribute clamping pressure effectively.

Product Parameters

The technical specifications for our Hot Dip Galvanized DIN 6921 Hex Flange Bolts are provided below for your procurement and engineering needs.

Product Features

These bolts are engineered with features specifically designed for long-term performance in harsh conditions:

• Superior Corrosion Protection: The thick, metallurgically bonded Hot Dip Galvanized coating provides decades of maintenance-free protection against rust and corrosion, even in coastal, industrial, and agricultural settings.
• Heavy-Duty Strength: Manufactured from high-strength carbon steel (Grades 8.8, 10.9, 12.9), these bolts provide the robust tensile and clamping strength needed for load-bearing structural connections.
• Integrated Flange Design: The built-in flange distributes clamping force over a wide area, prevents damage to the joint surface, and offers excellent resistance to loosening caused by vibration.
• Abrasion Resistant Coating: Unlike thinner platings, the HDG coating is highly resistant to damage during transport, handling, and installation, ensuring the protective barrier remains intact.
• Versatile Fully Threaded Body: The full-length threading allows for maximum clamping flexibility, making these bolts suitable for a wide variety of connection depths and material thicknesses.
• DIN 6921 Compliance: Manufactured to precise international standards, guaranteeing dimensional accuracy, consistent quality, and reliable performance.

Product Applications

The exceptional durability and corrosion resistance of our Hot Dip Galvanized Hex Flange Bolts make them the standard choice for demanding outdoor and structural applications:

• Structural Steel & Construction: Essential for assembling steel-frame buildings, bridges, stadiums, and other large-scale construction projects.
• Utilities & Infrastructure: Widely used in the erection of electrical transmission towers, communication masts, highway guardrails, and solar panel racking systems.
• Agriculture & Farming: Ideal for assembling heavy farm machinery, silos, grain bins, and irrigation systems that are constantly exposed to weather and corrosive materials.
• Transportation: Provides secure, long-lasting connections for truck frames, trailer hitches, and other heavy vehicle components exposed to road salt and moisture.
• Coastal and Industrial Plants: Perfect for use in environments with high humidity, salt spray, or industrial pollutants, such as docks, port facilities, and chemical processing plants.