Standard: GB /T 3390.1 - 2013
Available sizes: 10 to 9 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| 10 | 14 | 10.5 | 32 | 6.74 | 19.7 | 168.6 | 24 | 45 |
| 7 | 8 | 6 | 32 | 4.24 | 12.2 | 45.5 | 20 | 44 |
| 8 | 10 | 7.2 | 32 | 4.74 |
| 14.7 |
| 76.7 |
| 20 |
| 44 |
| 9 | 12 | 9 | 32 | 5.74 | 17.2 | 118 | 20 | 44 |
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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