Available sizes: 1/4 to 8# (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 1 | 7.5 | 0.6~1.2 | 8.75 | 3 | / | 9 | 0.8 | 0.6 | 9.25 | 0.7 |
| 10# | 0.8 | 6.5 | 0.6~1.2 | 7.75 | 2.8 | / | 8 | 0.7 | 0.5 | 8.25 | 0.6 |
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.
| 2# |
| / |
| 0.171 |
| 0.024~0.047 |
| 0.218 |
| 0.101 |
| 40 |
| 0.228 |
| 0.028 |
| 0.020 |
| 0.238 |
| 0.024 |
| 4# | / | 0.223 | 0.024~0.047 | 0.269 | 0.109 | 32 | 0.279 | 0.028 | 0.020 | 0.289 | 0.024 |
| 6# | / | 0.309 | 0.024~0.047 | 0.356 | 0.131 | 20 | 0.366 | 0.032 | 0.024 | 0.376 | 0.028 |
| 8# | 0.5 | 4.5 | 0.6~1.2 | 5.75 | 2.5 | / | 6 | 0.7 | 0.5 | 6.25 | 0.6 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.