Flange Bolts (Hex Flange Head Bolts DIN 6921)
Serrated hex flange bolts engineered for secure fastening without separate washers. The integrated flange provides a larger bearing surface that distributes clamping load evenly while the serrated face prevents loosening under vibration. Conforming to DIN 6921 standard, ideal for automotive, machinery, and structural assembly applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | DIN 6921, ISO 4162 |
| Thread Type | Metric Coarse / Fine Thread |
| Size Range | M5 – M20 |
| Length Range | 10mm – 200mm |
| Material | Carbon Steel (Grade 8.8, 10.9, 12.9) |
| Flange Type | Serrated (standard), Smooth Face (non-serrated) |
| Surface Finish | Zinc Plated, Zinc Flake (Geomet/Dacromet), Black Oxide |
| Drive Type | Hex Head (6-point external) |
| MOQ | 1,000 pcs (standard), 5,000 pcs (custom) |
| Lead Time | 7-15 days (standard), 20-30 days (custom) |
| Packaging | Bulk cartons / Inner box + carton / Custom labeling |
Available Sizes
M5, M6, M8, M10, M12, M14, M16, M18, M20
Applications
- Automotive engine and chassis assembly
- Machinery and equipment manufacturing
- Sheet metal assembly
- Power tools and appliances
- Agricultural machinery
- HVAC equipment mounting
Certifications
ISO 9001:2015 certified. Material test certificates (EN 10204 3.1/3.2) available. RoHS, REACH compliant.
Frequently Asked Questions
What is the advantage of a serrated flange bolt?
The integrated flange spreads the clamp load like a washer (no separate washer needed) and the serrations on the bearing face bite into the mating surface, resisting rotation and loosening under vibration.
What sizes are available?
Available sizes range from M5 – M20. Contact us with your required sizes and quantities for a quick quote.
What is the MOQ and lead time?
The MOQ is 1,000 pcs (standard), 5,000 pcs (custom). Lead time is 7-15 days (standard), 20-30 days (custom). Mixed-size containers and larger orders are negotiable — send us your requirement for a quick quote.
Do you provide material certificates?
Yes. Material test certificates per EN 10204 3.1 are available on request, and our manufacturing is ISO 9001:2015 certified. RoHS and REACH compliance documentation can also be provided.
