Standard: ASME B 18.6
Available sizes: 2# to 8# (7 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2# | 0.0990 | 82° | 0.033 | 0.025 | 0.022 | 28 | T8 | 0.167 | 0.059 | 0.094 | 0.187 |
| 3# | 0.1250 | 82° | 0.041 | 0.055 | 0.045 | 20 | T10 |
| 0.215 |
| 0.075 |
| 0.111 |
| 0.237 |
| 4# | 0.1510 | 82° | 0.049 | 0.060 | 0.050 | 19 | T15 | 0.262 | 0.091 | 0.132 | 0.287 |
| 5# | 0.1900 | 82° | 0.060 | 0.090 | 0.070 | 16 | T25 | 0.333 | 0.116 | 0.178 | 0.362 |
| 6# | 0.2500 | 82° | 0.079 | 0.105 | 0.085 | 14 | T30 | 0.442 | 0.153 | 0.221 | 0.477 |
| 7# | 0.3750 | 82° | 0.117 | 0.155 | 0.130 | 12 | T45 | 0.670 | 0.230 | 0.312 | 0.717 |
| 8# | 0.5000 | 82° | 0.131 | 0.169 | 0.150 | 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.