Product Details
Our DIN 6921 Hex Flange Bolts are meticulously crafted from high-quality carbon steel, available in property classes including 4.8, 8.8, 10.9, and 12.9 to accommodate diverse strength and load-bearing requirements. The standout feature of these bolts is the Yellow Zinc Plating, a multi-layer protective finish. The process involves electroplating a layer of zinc onto the steel, which acts as a sacrificial barrier against rust. This is followed by a yellow chromate conversion coating that passivates the zinc, sealing it and providing a secondary layer of protection that is visibly more robust and longer-lasting than clear or blue zinc coatings. The integrated flange under the head distributes clamping force over a broad area, preventing damage to the joint material and enhancing resistance to loosening. For maximum anti-vibration performance, these bolts can be supplied with serrations on the flange’s bearing surface, which grip the material to prevent rotation.
Product Parameters
The technical specifications for our Yellow Zinc Plated Carbon Steel DIN 6921 Hex Flange Bolts are detailed below to ensure a perfect match for your engineering needs.
| Parameter | Specification |
|---|
| Product Name | Hexagon Flange Bolts DIN 6921 |
| Standard | DIN 6921 |
| Material | Carbon Steel |
| Property Class / Grade | 4.8, 8.8, 10.9, 12.9 |
| Surface Treatment | Yellow Zinc Plated (YZP) |
| Diameter Range | M4 – M24 |
| Measurement System | Metric |
| Brand Name | Duojia |
| Place of Origin | Hebei, China |
| Key Feature | Enhanced Corrosion Resistance, Integrated Washer Flange |
| Application | Automotive, Agricultural Machinery, Construction |
Product Features
These Yellow Zinc Plated DIN 6921 Hex Flange Bolts are engineered with distinct features for superior functionality. The most critical benefit is the Enhanced Corrosion Protection provided by the Yellow Zinc Plating, which offers a durable defense against rust and oxidation, extending the service life of assemblies in outdoor and damp environments. The Integrated Flange Design streamlines assembly by combining the bolt and washer into a single component, saving both time and labor costs. This design also ensures Optimal Load Distribution, spreading the clamping force to reduce surface pressure and protect the integrity of the joint. Manufactured from High-Grade Carbon Steel, these bolts deliver the mechanical strength needed for secure and reliable connections. Optional Serrated Flanges provide an aggressive mechanical lock, delivering exceptional Vibration Resistance for dynamic applications. Full compliance with the DIN 6921 Standard guarantees dimensional uniformity and interchangeability.
Product Applications
The excellent corrosion resistance and robust design of our Yellow Zinc Plated Hex Flange Bolts make them highly suitable for a variety of demanding applications. In the Automotive Industry, they are a prime choice for securing components on vehicle chassis, suspension systems, and engine compartments where exposure to road spray and environmental elements is common. For Agricultural and Farm Equipment, these bolts provide long-lasting, reliable connections on machinery like tractors, plows, and harvesters that operate in diverse weather conditions. In Construction and Outdoor Installations, they are used to assemble steel framing, secure fencing, mount solar panel racks, and in playground equipment, where durability against the elements is crucial. They are also widely used in HVAC systems, outdoor electrical enclosures, and general industrial machinery where a combination of high strength and superior corrosion protection is required.
