Standard: QC /T 615 - 2011
Available sizes: 01 to 03 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 01 | NST4.5 | 11.8~12 | 5 | 7.8~8 | 1.5 | 2.8~3 | 2 | 7.5 | 14 | 14.5 | 1.5~1.7 |
| 02 | NST5.5 | 12.3~12.5 | 5 | 7.8~8 | 2 | 3.6~4.2 | 3 |
| 12.5 |
| 14.5 |
| 18 |
| 0.8~1 |
| 03 | NST5.5 | 12.3~12.5 | 5 | 7.8~8 | 2 | 3.6~4.2 | 3 | 12.5 | 15 | 18 | 1.4~1.6 |
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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