Standard: EN 14399
Available sizes: M12 to M22 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| M12 | 16.75 | 3 | 6 | 16.85 | 35 | 25 | 17.85 | 36.8 | 0.8 |
| M16 | 23.05 | 4 | 7 | 23.15 | 46.5 | 33 | 24.15 | 50.6 | 0.8 |
| M20 |
| 28.3 |
| 4 |
| 7 |
| 28.4 |
| 54 |
| 43 |
| 29.4 |
| 62.1 |
| 0.8 |
| M22 | 37.75 | 4 | 7.5 | 37.85 | 78 | 56 | 38.85 | 83 | 0.8 |
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.
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.