Standard: GB /T 9160.2
Available sizes: Tr220 to Tr360 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Tr220 | HML 48 | MSL 48 | 15 | 34 | 20 | 4 | 270 | 253 | M8 | 290 | 10 |
| Tr240 | HML 56 | MSL 56 | 15 | 38 | 24 | 4 | 310 |
| 293 |
| M8 |
| 330 |
| 10 |
| Tr260 | HML 64 | MSL 64 | 15 | 42 | 24 | 5 | 356 | 335 | M8 | 380 | 12 |
| Tr280 | HML 72 | MSL 72 | 15 | 45 | 28 | 5 | 394 | 374 | M8 | 420 | 13 |
| Tr300 | HML 80 | MSL 76 | 18 | 52 | 28 | 5 | 442 | 418 | M10 | 470 | 14 |
| Tr320 | HML 88 | MSL 88 | 21 | 60 | 32 | 5 | 490 | 462 | M12 | 520 | 15 |
| Tr340 | HML 96 | MSL 96 | 21 | 60 | 36 | 5 | 530 | 502 | M12 | 560 | 15 |
| Tr360 | HML/500 | MSL 96 | 21 | 68 | 36 | 5 | 550 | 522 | M12 | 580 | 15 |
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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