Standard: ANSI B 18.25
Available sizes: 2 to 6 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| 2 | 方形 | 3.04 | 0.16 | 3 | 3.04 | 6~36 | 3 | 0.25 |
| 3 | 方形 | 5.045 | 0.25 | 5 | 5.045 | 10~56 | 5 | 0.4 |
| 4 | 矩形 | 3.16 | 0.25 | 5 | 5.045 | 10~56 | 3 | 0.4 |
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.
| 5 |
| 矩形 |
| 6.175 |
| 0.4 |
| 12 |
| 12.075 |
| 28~140 |
| 6 |
| 0.6 |
| 6 | 矩形 | 6.175 | 0.4 | 14 | 14.075 | 36~160 | 6 | 0.6 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.