Standard: GB /T 6564.1 - 2014
Available sizes: M2 to M5 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M2 | 0.45 | 1.04 | 2.4 | 4.68 | 4.32 | 0.9 | 25 | 2.36 | 8 | 4.5 | 2.5 |
| M2.5 | 0.7 | 1.8 | 3.95 | 7.22 | 6.78 | 1.4 | 38 |
| 3.82 |
| 20 |
| 7 |
| 4 |
| M3 | 1 | 2.42 | 5.6 | 10.22 | 9.78 | 2 | 38 | 5.7 | 30 | 10 | 6 |
| M4 | 1.5 | 4.02 | 8.95 | 16.27 | 15.73 | 3 | 38 | 9.64 | 50 | 16 | 10 |
| M5 | 1.75 | 5.21 | 11.35 | 18.27 | 17.73 | 3.5 | 38 | 11.57 | 55 | 18 | 12 |
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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