Standard: CNS 160 - 1994
Available sizes: 3.2 to 8.4 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| 3.2 | 12 | 2 | 0.4 | 8 | 2.5 | 0.4 | 4.5 | 0.5 |
| 3.7 | 17 | 2.5 | 0.6 | 12 | 3.5 | 1.6 | 7 | 1 |
| 4.3 | 19 | 3 | 0.6 | 14 | 3.5 | 1.89 | 7.5 | 1 |
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.
| 5.3 |
| 26 |
| 4 |
| 1 |
| 20 |
| 4.5 |
| 5.58 |
| 10 |
| 1.6 |
| 6.4 | 33 | 4.5 | 1 | 27 | 4.5 | 8.51 | 13 | 1.6 |
| 7.4 | 40 | 4.5 | 1 | 34 | 6.5 | 12.2 | 18 | 1.6 |
| 8.4 | 42 | 4.5 | 1 | 36 | 6.5 | 13.1 | 18 | 1.6 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.