Standard: GOST 10619 - 1980
Available sizes: 2.5 to 4 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.5 | 5.6 | 1.25 | 2.8 | 0.86 | 1 | 5.3 | 1.65 | 0.85 | 1 | 0.8 | 0.6 |
| 3 | 9.2 | 2.05 | 4.5 | 1.26 | 1.51 | 8.84 | 2.5 |
| 1.35 |
| 2 |
| 1.2 |
| 1 |
| 4 | 14.5 | 3.4 | 7.4 | 2.06 | 2.31 | 14.07 | 4 | 2.1 | 3 | 2 | 1.6 |
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.
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.