Standard: QC /T 610 - 1999
Available sizes: 1.8 to 3.7 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.8 | 2.8 | 8 | 0.8 | 13.6 | 8 | 2.6 | 14 | 7.6 | 2.4 | 14.4 | 8.4 |
| 2.7 | 4.8 | 11 | 1.2 | 17.6 | 11 | 4.6 | 18 | 10.6 | 3.3 | 18.4 | 11.4 |
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.
| 3.7 |
| 7.8 |
| 15 |
| 1.7 |
| 22.6 |
| 15 |
| 7.6 |
| 23 |
| 14.6 |
| 4.4 |
| 23.4 |
| 15.4 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.