About 法蘭 Screw
Flange bolts integrate a washer-like bearing face under the head — one part instead of two. The face is often serrated to resist loosening, which is why they are common in automotive and line assembly.
Standards DIN 6921 · ISO 4162
- Zinc-plated steel
- Low cost with adequate strength.
- 304 stainless
- Wet and outdoor service.
How to choose
- Serrated flanges mark the surface — use smooth flanges on finished parts.
- The flange is wider than a plain head; check clearance near ribs and walls.