Standard: GB /T 5648 - 2008
Available sizes: 10 to 8 (5 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | M27*1.5 | 30 | 22 | 14 | 18 | 18.25 | 38 | 22 | 18.15 | 11 |
| 4 | M10*1 | 12 | 8 | 7 | 5 | 5.25 | 16 | 10 | 5.15 | 5 |
| 5 | M14*1.5 | 17 |
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.
| 11 |
| 11 |
| 8 |
| 8.25 |
| 20 |
| 12 |
| 8.15 |
| 8 |
| 6 | M18*1.5 | 22 | 16 | 11.5 | 12 | 12.25 | 28 | 16 | 12.15 | 8.5 |
| 8 | M24*1.5 | 27 | 19 | 13 | 16 | 16.25 | 34 | 20 | 16.15 | 10 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.