China Suppliers Factory Yellow Zinc Plated Hex Flange Bolts DIN6921 - High Quality Fasteners
There is an integral flange (circular gasket) below the bolt head, which increases the contact area, disperses pressure, and reduces damage to the connection surface.
Commonly designed as a hexagonal head, easy to tighten with standard tools. Some high-strength models use twelve corner heads.
The flange surface of some flange bolts has radial tooth patterns to enhance friction and prevent loosening.
The integrated flange replaces traditional gaskets, simplifies installation steps, and reduces costs.
The flange surface increases friction, and the tooth pattern design further prevents bolts from loosening in vibration environments.
The flange disperses the load, protects the surface of the connected parts, and avoids crushing or deformation.
When combined with flange surfaces and soft materials such as rubber gaskets, the sealing performance can be improved.
Key parts such as the engine, gearbox, and wheel hub are adapted to high vibration environments.
Heavy equipment, machine tools, pumps, valves, and other connections that require high preload force.
Wind and earthquake resistant structures such as bridges, steel frames, curtain walls, etc.
Scenarios with high requirements for safety and reliability, such as rail vehicles and signal equipment.
- Carbon Steel (Grade 4.8, 8.8, 10.9)
- Stainless Steel (A2-304, A4-316, corrosion-resistant)
- Alloy Steel (high-strength or high-temperature resistant)
- Galvanized (conventional anti-corrosion)
- Dacromet (high corrosion resistance)
- Hot Dip Galvanizing (heavy-duty anti-corrosion, suitable for outdoor use)
- Phosphating (enhancing wear resistance)