Standard: GB /T 29.1 - 2013
Available sizes: M3 to M6 (4 sizes)
| Size | P | k_max | s_max | s_min | k_nominal |
|---|---|---|---|---|---|
| M3 | 0.70 | 1.00 | 1.2 | 1.26 | 1.51 |
| M4 | 1.00 | 1.40 | 1.6 | 1.66 | 1.91 |
| M5 | 1.50 | 2.40 | 2.5 | 2.56 | 2.81 |
| M6 | 1.75 | 3.00 | 3 | 3.06 | 3.31 |
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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