Standard: GB 956.1 - 1987
Available sizes: 3 to 6 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| 3 | 4.3 | 8 | 0.06 | 4.6 | 8 | 0.5 |
| 4 | 6.4 | 10 | 0.2 | 6.76 | 11.8 | 0.6 |
| 5 | 10.5 | 10 | 0.76 | 10.93 | 19 | 1 |
| 6 | 12.5 | 10 | 1.24 | 12.93 | 23 |
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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