Standard: QC /T 865 - 2011
Available sizes: Φ1.9 to Φ2.9 (3 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| Φ1.9 | 2.54 | 7 | 1.75 | 1.5 | 2.46 | 4.1 | 2.1 | 2.03 | 3.7 | 0.785 |
| Φ2.5 | 3.55 | 7 | 2.6 | 2.3 | 3.46 | 6.6 | 2.94 | 2.84 | 6.06 | 1.3 |
| Φ2.9 | 4.24 | 8 |
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.
| 3.05 |
| 2.7 |
| 4.1 |
| 7.84 |
| 3.45 |
| 3.35 |
| 7.24 |
| 1.33 |
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