Available sizes: 2# to 6# (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2# | / | TSOS | TSO | 0.220 | 0.250 | 40 | 0.212 | 0.213 | 0.216 | 0.207 | 0.025 |
| 4# | 0.5 | TSOS | TSO | 6.2 | 4.8 | / | 4.2 |
| 4.22 |
| 4.30 |
| 4.07 |
| 0.63 |
| 6# | 0.6 | TSOS | TSO | 7 | 6.4 | / | 5.39 | 5.41 | 5.49 | 5.26 | 0.63 |
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.