Standard: HG /T 20634 - 2009
Available sizes: (M14) to M24 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| (M14) | 2 | 9.71 | 10.29 | 16 | 15.73 | 38 | 44 | 10.18 | 9.82 | 57 | 15.57 |
| M16 | 3 | 14.65 | 15.35 | 24 | 23.67 | 54 | 60 | 15.215 | 14.785 | 73 | 23.48 |
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.
| M20 | 3.5 | 18.28 | 19.12 | 30 | — | 66 | 72 | — | — | 85 | 29.48 |
| M24 | 3.5 | 20.58 | 21.42 | 33 | — | — | 78 | — | — | 91 | 32.38 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.