Standard: QC /T 600 - 1999
Available sizes: M5 to M8 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | 1 | 12 | 5.53 | 4 | 4.15 | 5.6 | 10 | 11.05 | 5.71 | 9.78 | 3.85 |
| M6 | 1.5 | 20 | 9.37 | 6.4 | 6.58 | 9.4 | 16 |
| 17.77 |
| 9.59 |
| 15.73 |
| 6.22 |
| M8 | 1.75 | 24 | 11.26 | 7.5 | 7.68 | 11.2 | 18 | 20.03 | 11.53 | 17.73 | 7.32 |
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.