Standard: GB 3734.2 - 1983
Available sizes: 10 to 8 (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | ZM22 | 20.4 | 20.3 | 16 | M24×1.5 | 15 | 7 | 18.3 | 18.4 | 11.5 | 18 |
| 4 | ZM10 | 7.2 | 7.1 | 10.5 | M10×1 | 3.5 | 4.5 | 5.21 | 5.28 | 7.5 | 5 |
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.
| 5 |
| ZM14 |
| 10.2 |
| 10.1 |
| 16 |
| M14×1.5 |
| 6 |
| 7 |
| 8.21 |
| 8.28 |
| 11.5 |
| 8 |
| 6 | ZM18 | 14.4 | 14.3 | 16 | M18×1.5 | 10 | 7 | 12.3 | 12.4 | 11.5 | 12 |
| 8 | ZM22 | 18.4 | 18.3 | 16 | M22×1.5 | 14 | 7 | 16.3 | 16.4 | 11.5 | 16 |
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