Standard: CNS 4360 - 1980
Available sizes: (M1.8) to M2.5 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| (M1.8) | 12 | 0.6 | 1.5 | 5.5 | 5.32 | 2.4 | 1.2 |
| M1 | / | 0.25 | 0.55 | 1.8 | 1.66 | 0.8 | 0.4 |
| M1.2 | 5 | 0.3 | 0.7 | 2.3 | 2.16 | 1 | 0.5 |
| M1.4 | 6 | 0.3 | 0.8 | 2.8 | 2.66 | 1.2 | 0.6 |
| M1.6 | 9 | 0.5 | 1.15 | 4 | 3.82 | 1.8 | 0.9 |
| M2 | 18 | 1 | 1.9 | 8 | 7.78 | 3.1 | 1.5 |
| M2.5 | 30 | 1.6 | 2.8 | 13 | 12.73 | 4.6 | 2.3 |
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.