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Hex Bolts
Hex bolts with metric fine pitch thread: DIN 960 / ISO 8765 (partial thread) and DIN 961 / ISO 8676 (full thread). The finer pitch gives a larger stress area, finer preload adjustment and better resistance to self-loosening — used in automotive, hydraulics and precision machinery.
| Size | Fine pitch (mm) | Extra-fine option |
|---|---|---|
| M8 | 1.0 | – |
| M10 | 1.25 | 1.0 |
| M12 | 1.5 | 1.25 |
| M14 | 1.5 | – |
| M16 | 1.5 | – |
| M18 | 1.5 | – |
| M20 | 1.5 | 2.0 |
| M22 | 1.5 | – |
| M24 | 2.0 | 1.5 |
Head dimensions as DIN 931/933. Other pitches on request.
| Finish | Applied | Notes |
|---|---|---|
| Zinc-nickel | Our own line | 12–15 µm, clear or black passivation; 1,000 h (12 µm) to 1,440 h (15 µm) neutral salt spray |
| Zinc flake (Dacromet/Geomet type) | Available | Electrolyte-free, no hydrogen embrittlement risk |
| Zinc plated | Our own line | Clear/blue, yellow or black passivation |
| Black oxide / phosphate | Available | Indoor or oiled service |
For property class 10.9 and above, choose zinc flake, or zinc-nickel with hydrogen-embrittlement relief agreed at order stage.
Tell us size, grade, finish and quantity. We reply with price and lead time within 24 hours.
