Standard: HG /T 20606
Available sizes: 10 to 65 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 22 | 55 | 14 | 4 | 4 | 80 | 95 | 11 | 14 | 95 | 4 |
| 15 | 34 | 75 | 14 | 4 | 4 | 100 | 115 |
| 11 |
| 14 |
| 115 |
| 4 |
| 20 | 49 | 100 | 18 | 4 | 4 | 130 | 150 | 14 | 18 | 150 | 4 |
| 25 | 77 | 130 | 18 | 4 | 8 | 160 | 185 | 14 | 18 | 185 | 8 |
| 32 | 115 | 170 | 18 | 4 | 8 | 210 | 220 | 18 | 18 | 220 | 8 |
| 40 | 169 | 225 | 22 | 8 | 8 | 265 | 285 | 18 | 22 | 285 | 8 |
| 50 | 273 | 335 | 26 | 12 | 12 | 375 | 395 | 18 | 22 | 405 | 12 |
| 65 | 324 | 395 | 26 | 12 | 12 | 440 | 445 | 22 | 22 | 460 | 12 |
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.