Standard: CNS 3135 - 1981
Available sizes: (M14) to M8 (5 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 3 | 0.8 | 15.35 | 14.65 | 24 | 23.65 | 35 | 50.9 | 15 | 36 |
| M10 | 2 | 0.6 | 10.35 | 9.65 | 16 | 15.75 | 23.2 | 33.9 | 10 | 24 |
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.
| M12 | 2.5 | 0.8 | 13.35 | 12.65 | 20 | 19.65 | 29.2 | 42.4 | 13 | 30 |
| M6 | 1.25 | 0.4 | 5.75 | 5.25 | 8 | 7.8 | 12.3 | 18.4 | 5.5 | 13 |
| M8 | 1.75 | 0.6 | 8.3 | 7.7 | 12 | 11.75 | 18.2 | 26.9 | 8 | 19 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.