Standard: EN 28675 - 1992
Available sizes: (M10) to M8 (6 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| (M10) | 1.5 | 20.67 | 23.36 | 7 | 15.1 | 14 | 5.14 | 21 | 19.64 | 6.42 |
| (M12) | 2 | 29.16 | 32.95 | 10 | 21.6 | 20 | 7.28 | 30 | 27.7 |
| 9.1 |
| (M14) | 2 | 35 | 39.55 | 12 | 25.9 | 24 | 8.72 | 36 | 33.25 | 10.9 |
| M10 | 1.5 | 17.73 | 20.03 | 6 | 13 | 12 | 4.56 | 18 | 16.63 | 5.7 |
| M12 | 1.5 | 26.16 | 29.56 | 9 | 19.5 | 18 | 6.74 | 27 | 24.85 | 8.42 |
| M8 | 1 | 15.73 | 17.77 | 5 | 10.8 | 10 | 3.76 | 16 | 14.63 | 4.7 |
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.