Standard: ZQ 4756 - 2006
Available sizes: M24 to M72×6 (8 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| M24 | 32 | 20 | 120 | 30 | M10 | 5.55 | 29 | 5 |
| M30 | 44 | 23 | 180 | 42 | M12 | 10.87 | 40 | 5 |
| M36 | 58 | 30 | 250 | 56 | M16 | 19.33 | 48 | 10 |
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.
| M42 |
| 74 |
| 30 |
| 300 |
| 72 |
| M16 |
| 31.96 |
| 48 |
| 10 |
| M48 | 92 | 33 | 360 | 90 | M20 | 49.94 | 53 | 15 |
| M56 | 112 | 33 | 440 | 110 | M20 | 74.6 | 53 | 15 |
| M64 | 142 | 33 | 560 | 140 | M20 | 120.84 | 53 | 15 |
| M72×6 | 162 | 33 | 640 | 160 | M20 | 157.7 | 53 | 15 |
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