Standard: ZQ 4351 - 2006
Available sizes: (M14) to M8 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 2.5 | 240 | 35.03 | 18.6 | 17.4 | 1.5 | 2 | 34 | 33 | 18 | 4.5 |
| (M18) | 3.5 | 852 | 55.37 | 26.6 | 25.4 | 2 | — | 50 | 49 | 26 | 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.
| (M22) |
| 4.5 |
| 2140 |
| 76.95 |
| 36.8 |
| 35.2 |
| 3 |
| — |
| 70 |
| 68.1 |
| 36 |
| 9 |
| M10 | 2 | 65 | 23.35 | 11.5 | 10.5 | 1.5 | — | 21 | 20.67 | 11 | 3.5 |
| M12 | 2.5 | 150 | 29.56 | 15.5 | 14.5 | 1.5 | — | 27 | 26.16 | 15 | 4.5 |
| M16 | 3 | 470 | 45.2 | 22.6 | 21.4 | 2 | — | 41 | 40 | 22 | 6 |
| M20 | 4 | 1400 | 66.44 | 31.8 | 30.2 | 3 | — | 60 | 58.8 | 31 | 8 |
| M8 | 1.5 | 22.8 | 17.77 | 8.4 | 7.6 | 1 | 1.25 | 16 | 15.73 | 8 | 2.5 |
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