Larger Bearing Area, Better Surface Protection
The integrated flange increases the contact area, reducing surface pressure and preventing deformation on soft materials such as aluminum, plastic, and thin sheets.
DIN 6921 Hexagon Flange Bolts
- Standard: DIN 6921
- Material: SUS304, SUS316, SUS410, Carbon Steel
- Thread Size: M5-M20
- Surface Treatment: Plain, Zinc Plated, HDG, Dacromet, Ruspert
- Min Order: 5000pcs
- Sample: Free sample (after quote)
- Delivery time: 30 – 45 Days
Product Overview
Product Application
DIN 6921 is a classic standard for hexagon flange bolts in industrial manufacturing. Its key feature is the integration of a disc-shaped flange beneath the hexagonal head. This flange effectively combines a ‘standard hexagon bolt (DIN 933)’ with a ‘flat washer’ into a single unit, eliminating the need for an additional washer during installation.
It is designed to provide a larger bearing surface and more reliable fastening performance. In many applications, the integrated flange eliminates the need for a separate washer, thereby simplifying the assembly process whilst improving load distribution and connection stability.
Draw
Specification
DIN 6921 vs DIN 933: Key Differences
The key advantages of DIN 6921 are its integrated flange design, larger bearing surface, faster installation, and improved connection stability, making it suitable for high-efficiency industrial applications.
The key advantages of DIN 933 are its simple structure, full-thread design, broad compatibility, and ease of replacement, making it a reliable choice for general fastening applications.
In simple terms: Choose DIN 6921 for higher efficiency and stronger connection reliability; choose DIN 933 for versatility and general-purpose fastening.
Product Advantages
Faster Assembly, Fewer Components
The built-in flange replaces separate washers, simplifying installation, reducing assembly steps, and improving efficiency in automated production lines.
More Stable Clamping Force, Better Reliability
The rigid flange design distributes preload more evenly, improving connection stability, vibration resistance, and sealing performance in critical applications.
Common Questions
What is DIN 6921?
DIN 6921 is a standard for hexagon flange bolts with an integrated flange under the hexagonal head.
What is the main advantage of flange bolts?
They provide a larger bearing surface and reduce the need for separate washers.
Can DIN 6921 bolts replace standard hex bolts?
Yes, when dimensions and strength requirements are compatible.
Can DIN 6921 screws be customized?
Yes. Custom sizes, materials, coatings, and packaging are available.
