Standard: ASME B 18.6
Available sizes: 0# to 8# (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0# | 0.0730 | 0.120 | 0.137 | 0.070 | 0.041 | 64 | 0 | 0.043 | 0.027 | 0.070 | 0.023 |
| 1# | 0.0990 | 0.167 | 0.187 | 0.118 | 0.074 | 48 | 1 |
| 0.074 |
| 0.058 |
| 0.118 |
| 0.057 |
| 2# | 0.1250 | 0.215 | 0.237 | 0.152 | 0.074 | 40 | 2 | 0.074 | 0.056 | 0.152 | 0.050 |
| 3# | 0.1640 | 0.285 | 0.312 | 0.186 | 0.108 | 32 | 2 | 0.108 | 0.090 | 0.186 | 0.084 |
| 4# | 0.2160 | 0.380 | 0.412 | 0.264 | 0.135 | 24 | 3 | 0.135 | 0.117 | 0.264 | 0.111 |
| 5# | 0.3125 | 0.556 | 0.597 | 0.374 | 0.206 | 18 | 4 | 0.205 | 0.187 | 0.374 | 0.182 |
| 6# | 0.4375 | 0.715 | 0.760 | 0.404 | 0.237 | 14 | 4 | 0.235 | 0.217 | 0.404 | 0.213 |
| 8# | 0.5000 | 0.765 | 0.815 | 0.416 | 0.249 | 13 | 4 | 0.247 | 0.229 | 0.416 | 0.225 |
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.