Standard: ASME B 18.13 - 2017
Available sizes: 2# to 8# (6 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2# | 0.0990 | 0.051 | 0.060 | 0.025 | 0.178 | 48 | 0.091 | 0.193 | 0.180 | 0.086 | 0.166 |
| 3# | 0.1250 | 0.065 | 0.075 | 0.031 | 0.220 | 40 | 0.118 |
| 0.245 |
| 0.231 |
| 0.113 |
| 0.207 |
| 4# | 0.1640 | 0.085 | 0.096 | 0.031 | 0.319 | 32 | 0.155 | 0.322 | 0.306 | 0.149 | 0.305 |
| 5# | 0.2160 | 0.112 | 0.125 | 0.062 | 0.429 | 24 | 0.203 | 0.425 | 0.407 | 0.196 | 0.414 |
| 6# | 0.3125 | 0.162 | 0.178 | 0.078 | 0.618 | 18 | 0.298 | 0.615 | 0.594 | 0.290 | 0.602 |
| 8# | 0.3750 | 0.195 | 0.212 | 0.093 | 0.711 | 16 | 0.361 | 0.740 | 0.716 | 0.353 | 0.695 |
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.