Standard: QC /T 883 - 2011
Available sizes: 4 to 9 (6 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| 4 | 5.0 | 2.2 | 4.6 | 5.4 | 4.7 | 40.9 | 3.8 | 7.14 |
| 5 | 7.0 | 3.0 | 6.5 | 7.4 | 6.7 | 49.7 | 5.4 | 9.78 |
| 6 | 8.8 | 3.6 | 8.1 | 9.4 | 8.7 | 50.5 | 6.1 | 11.71 |
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.
| 7 |
| 10.8 |
| 4.4 |
| 9.3 |
| 11.4 |
| 10.7 |
| 52.1 |
| 7.8 |
| 13.43 |
| 8 | 12.8 | 4.8 | 9.8 | 13.4 | 12.7 | 60.8 | 8.6 | 14.47 |
| 9 | 15.8 | 6.0 | 12.1 | 16.4 | 15.7 | 63.5 | 11.0 | 18.04 |
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