Standard: QJ 3146.4 - 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 | 15.25 | 15 | 20.2 | 20.45 | 30 | 29.67 | 0.6 | 0.3 | 33.6 | 19.95 |
| M12 | 1.5 | 18.25 | 18 | 23.7 | 23.95 | 36 | 35.61 | 0.6 | 0.3 | 40.4 | 23.45 |
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 | 4 | 3.75 | 6.2 | 6.45 | 8 | 7.85 | 0.5 | 0.2 | 8.71 | 5.95 |
| M5 | 1.25 | 6.25 | 6 | 8.8 | 9.05 | 13 | 12.73 | 0.5 | 0.2 | 14.3 | 8.55 |
| M6 | 1.5 | 9.25 | 9 | 12.6 | 12.85 | 19 | 18.67 | 0.6 | 0.3 | 21.1 | 12.35 |
| M8 | 1.5 | 12.25 | 12 | 16.4 | 16.65 | 24 | 23.67 | 0.6 | 0.3 | 26.8 | 16.15 |
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