Standard: ANSI B 18.3 - 2003
Available sizes: 0# to 4# (5 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 0# | 0.073 | 0.072 | 0.070 | 0.073 | 0.0695 | 64.0 | 72.0 | 0.112 | 0.073 | 0.118 |
| 1# | 0.099 | 0.096 | 0.095 | 0.099 | 0.0949 | 48.0 | 56.0 | 0.154 | 0.099 | 0.161 |
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.
| 2# | 0.125 | 0.111 | 0.121 | 0.125 | 0.1202 | 40.0 | 44.0 | 0.198 | 0.125 | 0.205 |
| 3# | 0.164 | 0.168 | 0.159 | 0.164 | 0.1585 | 32.0 | 36.0 | 0.262 | 0.164 | 0.270 |
| 4# | 0.190 | 0.183 | 0.185 | 0.190 | 0.1840 | 24.0 | 32.0 | 0.303 | 0.190 | 0.312 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.