Standard: GB /T 9074.1
Available sizes: (M3.5) to M4 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| (M3.5) | 1.25 | 16 | 24 | 2.5 | 1.6 | 2 |
| M2 | 0.45 | 6 | 8 | 0.9 | 0.6 | 0.6 |
| M2.5 | 0.6 | 8 | 11 | 1.2 | 0.8 | 0.8 |
| M3 | 0.8 | 10 | 15 |
| 1.6 |
| 1 |
| 1 |
| M4 | 1.75 | 24 | 37 | 3.5 | 2.5 | 3 |
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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