Standard: GB 6178 - 1986
Available sizes: M10 to M8 (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 3 | 6.7 | 16.16 | 33 | 33.2 | 25.9 | 24 | 29.5 | 28.66 | 34 | 39.55 |
| M12 | 4 | 8.5 | 23.52 | 49 | 51.1 | 38.9 | 36 |
| 40 |
| 39 |
| 50 |
| 60.79 |
| M4 | 0.8 | 2 | 3.52 | / | 6.9 | 5.75 | 5 | 6.7 | 6.4 | / | 8.79 |
| M5 | 1.25 | 3.1 | 5.15 | / | 11.6 | 8.75 | 8 | 9.8 | 9.44 | / | 14.38 |
| M6 | 1.75 | 4.25 | 8.3 | / | 16.6 | 13 | 12 | 15.8 | 15.37 | / | 20.03 |
| M8 | 2 | 5.7 | 11.28 | / | 22.5 | 17.3 | 16 | 20.8 | 20.28 | / | 26.75 |
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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