Standard: EN 1665
Available sizes: M10 to M8 (4 sizes)
| Standard Body | Standard Number |
|---|---|
| EN | EN 1665(R) |
| DIN | DIN EN 1665R |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2.5 | 3 | 29.67 | 43 | 20 | 46 |
| 52 |
| 18.9 |
| 30 |
| 65 |
| 19.67 |
| M5 | 1 | 1.1 | 9.78 | 14.2 | 6 | 18 | / | 6.6 | 10 | — | 5.82 |
| M6 | 1.5 | 1.5 | 15.73 | 22.3 | 10 | 26 | 32 | 10.4 | 16 | — | 9.78 |
| M8 | 2 | 2.1 | 20.67 | 30.5 | 14 | 34 | 40 | 13.7 | 21 | — | 13.73 |
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.