Standard: DL /T 284 - 2012
Available sizes: M10 to M20 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| M10 | 1.75 | 18 | 17.57 | 19.85 | 12.2 | 10.4 |
| M12 | 2.5 | 27 | 26.16 | 29.56 | 16.9 | 15.1 |
| M16 | 2.5 | 34 | 33 | 37.29 | 20.2 | 18.1 |
| M18 | 3 | 41 | 40 |
| 45.2 |
| 24.7 |
| 22.6 |
| M20 | 3.5 | 50 | 49 | 55.37 | 29.5 | 27.4 |
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.
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.