Standard: GOST 9650
Available sizes: 10 to 8 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 10 | 28 | 5 | 1 | 33 | 4 | 5.5 | 1.6 |
| 12 | 32 | 6.3 | 1 | 38 | 5 | 6 | 1.6 |
| 3 | 6 | 1 | 0.6 | 7 | 1 | 1.5 | 0.6 |
| 4 | 10 | 1.6 | 0.6 | / |
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.
| 2 |
| / |
| 0.6 |
| 5 | 14 | 3.2 | 0.6 | 18 | 2.5 | 4 | 1 |
| 6 | 18 | 4 | 0.6 | 22 | 3 | 4 | 1.6 |
| 8 | 22 | 5 | 0.6 | 28 | 3 | 5 | 1.6 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.