Standard: GB /T 802.5 - 2009
Available sizes: M10 to M8 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2.5 | 34.5 | 35.5 | 32.95 | 21 | 2 | 1.5 | 20.5 | 35 | 28 | 21.5 |
| M4 | 0.8 | 10.15 | 10.85 | 8.79 | 6 | / | / |
| 5.75 |
| 10.5 |
| 7.5 |
| 6.25 |
| M5 | 1.25 | 13.65 | 14.35 | 14.38 | 8.9 | 1 | / | 8.55 | 14 | 12.5 | 9.25 |
| M6 | 1.75 | 22.1 | 22.9 | 20.03 | 13.5 | 1.5 | 1.25 | 13.1 | 22.5 | 18 | 13.9 |
| M8 | 2 | 27.1 | 27.9 | 26.75 | 16.5 | 1.5 | / | 16.1 | 27.5 | 23 | 16.9 |
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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