Standard: CNS 11328 - 1985
Available sizes: 12 to 22 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 12 | 17 | 4.5 | 5 | 17.7 | 32 | 1.5 | 1.5 | 31 | 4 |
| 16 | 23 | 6 | 6.7 | 23.8 | 44 | 2 | 2 | 43 | 5.3 |
| 20 | 28 | 6 |
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.
| 6.7 |
| 28.8 |
| 56 |
| 2.4 |
| 2.4 |
| 54.8 |
| 5.3 |
| 22 | 31 | 8 | 8.7 | 32 | 60 | 2.8 | 2.8 | 58.8 | 7.3 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.