Standard: QJ 3146.2 - 2002
Available sizes: M10 to M8 (8 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 | 19.2 | 18.77 | 36 | 35.61 | 0.3 | 34.9 | 40.4 | 0.6 |
| M2 | 0.45 | — | — | 2 | 1.75 | 5 | 4.88 | 0.2 | 4.4 | 5.3 | 0.4 |
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.
| M2.5 |
| 0.7 |
| — |
| — |
| 3.2 |
| 2.9 |
| 7 |
| 6.85 |
| 0.2 |
| 6.4 |
| 7.6 |
| 0.5 |
| M3 | 1 | 1.14 | 1 | 4.8 | 4.5 | 10 | 9.78 | 0.2 | 9.3 | 10.9 | 0.5 |
| M4 | 1.5 | 1.64 | 1.5 | 8 | 7.64 | 17 | 16.73 | 0.3 | 16 | 18.9 | 0.6 |
| M5 | 1.5 | 1.64 | 1.5 | 11.2 | 10.77 | 22 | 21.67 | 0.3 | 21 | 24.5 | 0.6 |
| M6 | 1.5 | 1.64 | 1.5 | 14.4 | 13.97 | 27 | 26.67 | 0.3 | 26 | 30.2 | 0.6 |
| M8 | 1.5 | 1.64 | 1.5 | 17.6 | 17.17 | 32 | 31.61 | 0.3 | 30.9 | 35.8 | 0.6 |
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