Standard: QC /T 889 - 2011
Available sizes: 01 to 04 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 01 | 4~4.15 | 4.8~5.2 | 2.5~3.1 | 5 | 8.9~9.2 | 0.74~0.99 | 0.3 | 10.6~11 | 0.3~0.35 |
| 02 | 6~6.15 | 7.8~8.2 | 3.7~4.3 | 8 | 13.9~14.2 | 0.94~1.19 | 0.4 | 16.3~16.7 | 0.4~0.45 |
| 03 | 9~9.15 |
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.
| 11.8~12.2 |
| 4.7~5.3 |
| 12 |
| 21.9~22.2 |
| 1.15~1.4 |
| 0.5 |
| 25.3~25.7 |
| 0.5~0.55 |
| 04 | 12~12.15 | 15.8~16.2 | 5.5~6.1 | 16 | 27.9~28.2 | 1.35~1.6 | 0.5 | 33.8~34.2 | 0.6~0.65 |
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