Standard: QC /T 876 - 2011
Available sizes: NST 3 to NST 4 (3 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| NST 3 | 8.3 | 5.32 | 3.4 | 7.6 | 0.6 | 2.6 | 2.4 | 5.5 | 3 |
| NST 3.5 | 10.5 | 7.78 | 4.3 | 9.8 | 0.9 | 3.7 | 3.6 | 8 | 3.8 |
| NST 4 |
| 13.5 |
| 9.78 |
| 5.9 |
| 12.2 |
| 1 |
| 4.8 |
| 4 |
| 10 |
| 5.3 |
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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