Standard: GB 24814 - 2009
Available sizes: 5 to 9 (5 sizes)
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| 5 | 32 | 0.63 | 30 | 22 | 7.9 |
| 6.3 | 40 | 1 | 38 | 28 | 10 |
| 7.1 | 50 | 1.6 | 47 | 35 | 12.5 |
| 8 | 63 | 2.5 | 59 | 44 | 15.7 |
| 9 | 80 |
| 4 |
| 76 |
| 56 |
| 20 |
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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