Standard: QJ 2379 - 1992
Available sizes: M1.6 to M3 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| M1.6 | 0.4 | 0.45 | 0.31 | 1 | 0.75 | 0.64 | 0.25 | 0.84 |
| M2 | 0.5 | 0.6 | 0.46 | 2 | 1.75 | 0.8 | 0.4 | 1.05 |
| M2.5 | 0.8 | 1 | 0.86 | 3.5 |
| 3.2 |
| 1.28 |
| 0.8 |
| 1.63 |
| M3 | 1 | 1.2 | 1.06 | 4 | 3.7 | 1.6 | 1 | 2 |
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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