Available sizes: 1/4 to 8# (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 1 | 1.91 | 9.98 | 9 | 9.89 | / | 9.6 | 2.4 | 9.9 | 1.83 | 11.11 |
| 10# | 0.8 | 1.91 | 8.82 | 7.37 | 8.72 | / | 9.6 | 2.4 |
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.
| 8.74 |
| 1.83 |
| 9.53 |
| 4# | / | 0.075 | 0.293 | 0.213 | 0.289 | 32 | 0.250 | 0.93 | 0.290 | 0.72 | 0.312 |
| 6# | / | 0.075 | 0.347 | 0.290 | 0.343 | 32 | 0.375 | 0.93 | 0.344 | 0.72 | 0.375 |
| 8# | 0.5 | 1.91 | 5.49 | 4.2 | 5.39 | / | 5 | 2.4 | 5.41 | 1.83 | 6.35 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.