Standard: QC /T 624
Available sizes: 01 to 04 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 01 | 15.4 | 19.3~19.9 | 16.4~16.8 | 13.3~13.9 | 23.0 | 6.4 | 3.8 | 12.4 | 9.8 | 10.4~10.8 | 21.4 |
| 02 | 21.4 | 23.3~23.9 | 20.4~20.8 | 19.3~19.9 | 29.0 | 12.4 | 9.8 | 16.4 | 13.8 | 16.4~16.8 | 25.4 |
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.
| 03 | 24.4 | 28.3~28.9 | 25.4~25.8 | 22.3~22.9 | 32.0 | 15.4 | 12.8 | 21.4 | 18.8 | 19.4~19.8 | 30.4 |
| 04 | 30.4 | 34.3~34.9 | 31.4~31.8 | 28.3~28.9 | 38.0 | 21.4 | 18.8 | 27.4 | 24.8 | 25.4~25.8 | 36.4 |
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