Standard: GB 3763 - 1983
Available sizes: M10 to M18 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| M10 | 1.25 | 7 | 6.57 | 18 | 17.73 | 20.8 | 0.803 |
| M12 | 1.5 | 8 | 7.3 | 24 | 23.67 | 27.7 | 1.46 |
| M14 | 1.5 | 9 | 7.7 | 27 | 26.67 | 31.2 | 2.42 |
| M16 |
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.
| 1.5 |
| 10 |
| 8.7 |
| 34 |
| 33.38 |
| 39.3 |
| 3.72 |
| M18 | 1.5 | 12 | 10.7 | 36 | 35.38 | 41.6 | 5.58 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.