Standard: ASME B 18.6
Available sizes: 1# to 8# (8 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1# | 0.0860 | 82° | 80° | 0.022 | 0.017 | 32 | T6 | 0.144 | 0.051 | 0.069 | 0.162 |
| 2# | 0.1120 | 82° | 80° | 0.033 | 0.028 | 24 | T8 |
| 0.191 |
| 0.067 |
| 0.094 |
| 0.212 |
| 3# | 0.1380 | 82° | 80° | 0.045 | 0.035 | 20 | T10 | 0.238 | 0.083 | 0.111 | 0.262 |
| 4# | 0.1640 | 82° | 80° | 0.051 | 0.040 | 18 | T15 | 0.285 | 0.100 | 0.132 | 0.312 |
| 5# | 0.2160 | 82° | 80° | 0.070 | 0.055 | 14 | T25 | 0.380 | 0.132 | 0.178 | 0.412 |
| 6# | 0.3125 | 82° | 80° | 0.105 | 0.087 | 12 | T40 | 0.556 | 0.191 | 0.266 | 0.597 |
| 7# | 0.4375 | 82° | 80° | 0.125 | 0.105 | 10 | T50 | 0.715 | 0.223 | 0.352 | 0.760 |
| 8# | 0.5000 | 82° | 80° | 0.135 | 0.120 | 10 | T50 | 0.765 | 0.223 | 0.352 | 0.815 |
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.