Standard: GB /T 878 - 2007
Available sizes: M1 to M3 (6 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 878 |
| DIN | DIN EN ISO 2342 |
| ISO | ISO 2342 |
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| M1 | 0.25 | 0.6 | 0.25 | 0.45 | 1.4 | 1.06 | 0.79 | 0.63 | 1.2 | 0.31 |
| M1.2 | 0.4 | 1 | 0.3 | 0.5 | 2.4 | 1.86 | 1.2 | 1 | 2 | 0.36 |
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.
| M1.6 | 0.5 | 1.25 | 0.5 | 0.7 | 3.6 | 2.86 | 1.5 | 1.25 | 3 | 0.56 |
| M2 | 0.7 | 1.75 | 0.6 | 0.8 | 4.8 | 3.82 | 2.05 | 1.75 | 4 | 0.66 |
| M2.5 | 1 | 2.5 | 1 | 1.2 | 7.2 | 5.82 | 2.9 | 2.5 | 6 | 1.06 |
| M3 | 1.5 | 3.8 | 1.6 | 1.91 | 12 | 9.78 | 4.25 | 3.75 | 10 | 1.66 |
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