Standard: UNI 9319 - 1994
Available sizes: M10 to M8 (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2.5 | 3.5 | 1 | 23.8 | 29.8 | 1.5 | / | 29.9 | 12.2 | 22 | 37.29 |
| M12 | 3 | 4 | 1 | 25.9 | 33.2 | 2 | / |
| 29.9 |
| 13.2 |
| 24 |
| 39.55 |
| M3 | 0.7 | 0.8 | 0.4 | 4.6 | 5.9 | / | / | 5.5 | 2.3 | 4 | 7.66 |
| M4 | 1 | 2 | 1 | 6.75 | 8.8 | 0.75 | / | 8.2 | 3.3 | 6 | 11.05 |
| M5 | 1.5 | 2 | 1 | 10.75 | 15.3 | 1.25 | / | 12.6 | 5.5 | 10 | 18.9 |
| M6 | 2 | 2 | 1 | 15.1 | 20.2 | 1.5 | / | 18 | 7.7 | 14 | 24.49 |
| M8 | 2.5 | 3 | 1 | 19.5 | 24.8 | 1.5 | / | 22.5 | 9.9 | 18 | 29.56 |
Standard corrosion protection for indoor and mild outdoor environments.
Salt spray: 96–200 hours | RoHS compliant (trivalent chromium)
High-performance coating for automotive, marine, and harsh environments.
Salt spray: 720–1500 hours | Recommended for grade 8.8+
Heavy-duty protection for structural and outdoor applications.
Salt spray: 500–1000 hours | Thread tolerance adjustment required
Note for high-strength fasteners (Grade 10.9, 12.9): Electroplating processes require hydrogen embrittlement relief baking (minimum 4 hours at 200°C within 4 hours of plating). Contact our engineering team for grade-specific plating recommendations.
Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.
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