Standard: JIS B 1216
Available sizes: 2 to 5 (4 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 2 | 2.9 | 0.3 | 0.325 | 2.75 | 10 | 1.3 | 0.275 |
| 3 | 4.9 | 0.4 | 0.43 | 4.75 | 14 | 1.55 | 0.37 |
| 4 | 7.9 | 0.5 | 0.53 | 7.75 | 17.5 | 1.8 | 0.47 |
| 5 | 11.9 | 0.9 | 0.95 |
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.
| 11.75 |
| 27 |
| 2.8 |
| 0.85 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.