Standard: HG /T 20256 - 2016
Available sizes: M14 to M27 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal |
|---|---|---|---|---|---|---|
| M14 | 29.3 | 26.16 | 50 | 16.4 | 15.7 | 27 |
| M16 | 44.8 | 40 | 177 | 24.4 | 23.1 | 41 |
| M20 | 54.88 | 49 | 322 | 30.4 | 28.8 | 50 |
| M24 | 65.86 | 58.8 | 558 | 36.5 | 34.9 | 60 |
| M27 |
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.
| 76.27 |
| 68.1 |
| 862 |
| 45.5 |
| 43.92 |
| 70 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.