Standard: GOST 2235 - 1977
Available sizes: (18) to 24 (5 sizes)
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| (18) | 2.5 | 39.6 | 22 | 36 | 15 |
| (22) | 4 | 60.8 | 36 | 55 | 23 |
| 16 | 2.5 | 33.3 | 18 | 30 | 13 |
| 20 | 3 | 50.9 | 27 | 46 | 19 |
| 24 | 5 | 83.4 |
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.
| 48 |
| 75 |
| 30 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.