Standard: HG /T 20606
Available sizes: 10 to 65 (8 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 22 | 3 | 51 | 51 | 44 | 44 | 61 | 1.5 | 51 | 51 |
| 15 | 34 | 3 | 71 | 71 | 64 | 64 | 82 | 1.5 | 71 | 71 |
| 20 | 49 | 3 | 92 | 92 | 86 | 86 | 103 | 1.5 | 92 | 92 |
| 25 | 77 | 3 | 127 | 127 | 116 | 116 | 138 | 1.5 | 127 | 127 |
| 32 | 115 | 3 | 162 | 168 | 152 | 152 | 174 | 1.5 | 162 | 168 |
| 40 | 169 | 3 | 218 | 224 | 207 | 207 | 247 | 1.5 | 218 | 224 |
| 50 | 273 | 3 | 329 | 340 | 317 | 317 | 364 | 1.5 | 328 | 352 |
| 65 | 324 | 3 | 384 | 400 | 373 | 373 | 424 | 1.5 | 378 | 417 |
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.
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