Standard: EN 1677
Available sizes: 3 to 8 (6 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 3 | 0.5 | 8 | 17 | 15 | 11 | 11 | 11 |
| 4 | 1.12 | 12 | 25 | 22 | 17 | 16 | 17 |
| 5 | 2 | 16 | 34 | 30 | 23 | 21 | 23 |
| 6 |
| 3.15 |
| 20 |
| 43 |
| 38 |
| 29 |
| 27 |
| 29 |
| 7 | 5.3 | 26 | 55 | 49 | 37 | 35 | 37 |
| 8 | 8 | 32 | 68 | 60 | 46 | 43 | 46 |
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.