Standard: HG /T 20611
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 | 26 | 2 | 4 | 51 | 51 | 42 | 42 | 61 | 61 | 51 | 61 |
| 15 | 36 | 2 | 4 | 71 | 71 | 52 | 52 |
| 82 |
| 82 |
| 71 |
| 82 |
| 20 | 53 | 2 | 4 | 92 | 92 | 69 | 69 | 103 | 103 | 92 | 103 |
| 25 | 81 | 2 | 4 | 127 | 127 | 100 | 100 | 144 | 144 | 127 | 138 |
| 32 | 118 | 2 | 4 | 168 | 168 | 138 | 138 | 180 | 180 | 162 | 174 |
| 40 | 170 | 2 | 4 | 224 | 224 | 190 | 190 | 257 | 257 | 218 | 247 |
| 50 | 270 | 2 | 4 | 340 | 352 | 290 | 300 | 391 | 388 | 329 | 364 |
| 65 | 320 | 2 | 4 | 400 | 417 | 340 | 356 | 458 | 458 | 384 | 424 |
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.