Standard: ASME B 18.3 - 2003
Available sizes: 0# to 5# (6 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 0# | 0.0730 | 0.017 | 0.035 | 0.060 | 64.0 | 72.0 | 0.045 | 0.021 | 0.049 |
| 1# | 0.0990 | 0.023 | 0.050 | 0.070 | 48.0 | 56.0 | 0.062 | 0.027 | 0.066 |
| 2# |
| 0.1250 |
| 0.027 |
| 0.062 |
| 0.080 |
| 40.0 |
| 44.0 |
| 0.078 |
| 0.033 |
| 0.083 |
| 3# | 0.1640 | 0.037 | 0.078 | 0.090 | 32.0 | 36.0 | 0.103 | 0.043 | 0.109 |
| 4# | 0.2500 | 0.059 | 0.125 | 0.125 | 20.0 | 28.0 | 0.149 | 0.067 | 0.156 |
| 5# | 0.3750 | 0.089 | 0.188 | 0.188 | 16.0 | 24.0 | 0.241 | 0.099 | 0.250 |
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.