Standard: QJ 3146.3 - 2002
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 | 1.5 | 1.64 | 1.5 | 12 | 11.57 | 30 | 29.67 | 0.3 | 29 | 33.6 | 0.6 |
| M12 | 1.5 | 1.64 | 1.5 | 14.4 | 13.97 | 36 | 35.61 | 0.3 | 34.9 | 40.4 | 0.6 |
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.
| M4 | 0.8 | — | — | 3 | 2.75 | 8 | 7.85 | 0.2 | 7.4 | 8.7 | 0.5 |
| M5 | 1.25 | 1.14 | 1 | 4.8 | 4.5 | 13 | 12.73 | 0.2 | 12.2 | 14.3 | 0.5 |
| M6 | 1.5 | 1.64 | 1.5 | 7.2 | 6.84 | 19 | 18.67 | 0.3 | 18 | 21.1 | 0.6 |
| M8 | 1.5 | 1.64 | 1.5 | 9.6 | 9.24 | 24 | 23.67 | 0.3 | 23 | 26.8 | 0.6 |
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