Product Details
Our Partially Threaded DIN 6921 Hex Flange Bolts are defined by their specific geometry, which is optimized for structural joints. The design incorporates a smooth, unthreaded shank that corresponds to the thickness of the materials being clamped, ensuring the threads only engage within the nut or tapped hole. This prevents thread damage from shear loads and provides a tighter, more secure fit by acting as a dowel for perfect alignment. These bolts are forged from high-quality carbon steel and are available in various property classes (e.g., 8.8, 10.9, 12.9) to meet specific tensile strength requirements. The entire fastener is protected by a White Zinc Plated finish, an electro-galvanized coating that provides a clean, bright appearance and effective defense against rust in dry or mildly damp environments. The built-in flange beneath the head increases the bearing surface, preventing embedment into the joint material and enhancing the bolt’s natural resistance to loosening.
Product Parameters
The technical specifications for our White Zinc Partially Threaded DIN 6921 Hex Flange Bolts are provided below for your reference.
| Parameter | Specification |
|---|
| Product Name | Partially Threaded Hexagon Flange Bolts DIN 6921 |
| Standard | DIN 6921 |
| Material | Carbon Steel |
| Property Class / Grade | 4.8, 8.8, 10.9, 12.9 |
| Surface Treatment | White Zinc Plated (WZP) / Clear Zinc |
| Thread Style | Partially Threaded |
| Diameter Range | M4 – M24 |
| Measurement System | Metric |
| Brand Name | Duojia |
| Place of Origin | Hebei, China |
| Key Feature | Superior Shear Strength due to Unthreaded Shank |
| Application | Structural Engineering, Heavy Industry, Automotive |
Product Features
Our Partially Threaded Hex Flange Bolts are engineered with several performance-enhancing features. The most significant is their Superior Shear Strength, as the solid, unthreaded shank is inherently stronger and more resistant to lateral forces than a threaded section, making it ideal for critical structural connections. This design also promotes Precise Joint Alignment, with the shank acting as a dowel pin to ensure components are perfectly aligned before clamping. The Efficient One-Piece Design with an integrated flange simplifies assembly by eliminating the need for a separate washer, saving time and reducing inventory. A Protective White Zinc Finish provides a clean, professional aesthetic while offering reliable corrosion resistance for a wide range of applications. Manufactured to the strict DIN 6921 Standard, these bolts ensure dimensional accuracy, consistent quality, and full interchangeability for dependable performance in any assembly.
Product Applications
The exceptional shear strength of our Partially Threaded DIN 6921 Hex Flange Bolts makes them essential for applications where joint integrity under lateral load is critical. In Structural Engineering and Construction, they are used to connect steel beams, columns, and trusses, where the unthreaded shank bears the shear load. In the Automotive Industry, they are indispensable for fastening suspension components, subframes, and steering knuckles, which are subject to intense vibration and side forces. For Heavy Machinery and Equipment, these bolts provide secure connections for pivot points, mounting brackets, and articulated joints on excavators, loaders, and cranes. They are also widely used in Transportation for assembling trailer frames and railcar components. Any application requiring a bolt to precisely locate and securely clamp two or more components under shear stress will benefit from the superior design of these fasteners.
