Standard: ASME B 18.6
Available sizes: 4# to 8# (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4# | 20 | 0.087 | 0.058 | 0.090 | 0.250 | 0.130 | 0.123 | 0.272 | 0.070 | 0.094 | 0.244 |
| 5# | 14 | 0.152 | 0.139 | 0.157 | 0.375 | 0.215 | 0.208 |
| 0.409 |
| 0.155 |
| 0.164 |
| 0.367 |
| 8# | 14 | 0.179 | 0.172 | 0.185 | 0.438 | 0.246 | 0.237 | 0.477 | 0.190 | 0.192 | 0.428 |
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.