| Size | Length (mm) | Head Diameter (mm) | Drive Size | Material | Finish |
|---|---|---|---|---|---|
| M3 | 6 - 20 | 5.5 | #2 Square | Stainless Steel | Zinc Plated |
| M4 | 8 - 25 | 7.0 | #2 Square | Carbon Steel | Black Oxide |
| M5 | 10 - 30 | 8.5 | #3 Square | Stainless Steel | Zinc Plated |
| M6 | 12 - 40 | 10.0 | #3 Square | Carbon Steel | Black Oxide |
| Material | Finish | Corrosion Resistance | Typical Use |
|---|---|---|---|
| Stainless Steel | Plain | High | Outdoor and marine applications |
| Carbon Steel | Zinc Plated | Medium | General industrial use |
| Alloy Steel | Black Oxide | Low to Medium | High-strength requirements |