Standard: QC /T 622 - 1999
Available sizes: 2 to 5 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 2 | 3.3 | 1 | 0.25 | 3.15 | 2.85 | 2.7 | 5.42 |
| 3 | 5.5 | 1.7 | 0.42 | 5.25 | 4.8 | 4.5 | 14.99 |
| 4 | 8.6 | 3 | 0.67 | 8.35 | 7.75 | 7.25 | 38.47 |
| 5 | 10.8 | 3 | 0.84 |
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.
| 10.45 |
| 9.6 |
| 9 |
| 61.06 |
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