Standard: GB /T 2673.1 - 2018
Available sizes: (M3.5) to M4 (5 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 2673.1 |
| ISO | ISO 14581 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M3.5) | 带轴肩 | 2.54 | 7.93 | 15.8 | 15.37 | 1.25 |
| 38 |
| 3.2 |
| 45 |
| 17.3 |
| 4.65 |
| M2 | 不带轴肩 | 0.79 | 2.4 | 4.7 | 4.4 | 0.45 | 25 | 1.1 | 8 | 5.5 | 1.5 |
| M2.5 | 不带轴肩 | 1.32 | 3.35 | 7.3 | 6.94 | 0.6 | 38 | 1.5 | 15 | 8.2 | 2.35 |
| M3 | 带轴肩 | 1.51 | 4.5 | 9.3 | 8.94 | 0.8 | 38 | 2 | 25 | 10.4 | 2.7 |
| M4 | 带轴肩 | 2.8 | 8.95 | 18.3 | 17.78 | 1.5 | 38 | 3.8 | 50 | 20 | 5 |
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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