Standard: ZQ 4362 - 2006
Available sizes: M24 to M72 (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M24 | 3.5 | 2 | 15 | 54 | 30 | 120 | / | / | 26 | 19 | / |
| M30 | 4.5 | 3 | 21 | 80 | 42 | 180 | M12 | 23 | 37 | 26 | 40 |
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.
| M36 |
| 5.5 |
| 4 |
| 28 |
| 102 |
| 56 |
| 250 |
| M16 |
| 30 |
| 49 |
| 35 |
| 48 |
| M42 | 6 | 4 | 36 | 128 | 72 | 300 | M16 | 30 | 65 | 45 | 48 |
| M48 | 6 | 5 | 45 | 155 | 90 | 360 | M20 | 33 | 83 | 55 | 53 |
| M56 | 6 | 5 | 55 | 190 | 110 | 440 | M20 | 33 | 103 | 67 | 53 |
| M64 | 6 | 5 | 70 | 240 | 140 | 560 | M20 | 33 | 133 | 85 | 53 |
| M72 | 6 | 5 | 70 | 275 | 160 | 640 | M20 | 33 | 153 | 100 | 53 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.