Standard: QJ 3243.3 - 2005
Available sizes: M5 to M8 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M5 | 7.1 | 7.85 | 8 | 10.6 | 8.1 | 6.3 | 7.1 | 5.5 | 2.3 | 9.8 | 1.2 |
| M6 | 1 1.7 | 11.82 | 12 | 16.8 | 13 | 10.3 | 1 1.1 | 8.1 |
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.
| 3.1 |
| 15.8 |
| 1.2 |
| M8 | 14.4 | 13.73 | 14 | 19.9 | 15 | 12.3 | 13.1 | 9.5 | 3.5 | 18.8 | 1.4 |
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