Standard: GB /T 828 - 1988
Available sizes: M1.6 to M4 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M1.6 | 0.4 | 1 | 0.56 | 2.6 | 1.3 | 0.8 | 4.0 | 0.5 | 0.7 | 3.7 | 1.1 |
| M2 | 0.5 | 2 | 0.86 | 3.6 | 1.8 | 1 | 5.6 |
| 0.8 |
| 1 |
| 5.3 |
| 1.6 |
| M2.5 | 0.8 | 3.5 | 1.26 | 5.7 | 3.0 | 1.6 | 9.5 | 1.2 | 1.51 | 9.14 | 2.8 |
| M3 | 1.25 | 5.5 | 2.06 | 9.2 | 4.8 | 2.5 | 16.0 | 2 | 2.31 | 15.57 | 4.5 |
| M4 | 1.5 | 7 | 2.56 | 11.2 | 6.0 | 3 | 20.0 | 2.5 | 2.81 | 19.48 | 5.7 |
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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