Standard: JB /T 14546
Available sizes: 1 to 5 (5 sizes)
| Size | P | s_max | s_min |
|---|---|---|---|
| 1 | 2.1～3.0 | 3.0～8.0 | 0.15～1.5 |
| 2 | 4.1～6.0 | 6.0～16.0 | 0.15～1.5 |
| 3 | 7.1～8.0 | 12.0～23.0 | 0.15～2.0 |
| 4 | 9.1～11.0 | 13.0～35.0 | 0.15～2.0 |
| 5 | 11.1～14.0 | 17.0～35.0 | 0.15～2.0 |
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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