Standard: ZQ 4329 - 2006
Available sizes: M16 to M30 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M16 | 30 | 134 | 32 | 38 | 18 | 34.6 | 8 | 1.6 | 30 | 20.5 | 4 |
| M20 | 41 | 450 | 46 | 55 | 25 | 53.1 | 10 | 2 | 46 | 30.5 | 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.
| M24 |
| 55 |
| 1100 |
| 63 |
| 75 |
| 35 |
| 75 |
| 14 |
| 2.5 |
| 65 |
| 42.5 |
| 6 |
| M30 | 70 | 2230 | 85 | 100 | 45 | 92.4 | 16 | 3 | 80 | 56.5 | 10 |
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