Standard: JIS B 2805 - 1978
Available sizes: 0.6 to 1.5 (6 sizes)
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.6 | 0.67 | 0.18 | 1.9 | 0.55 | 0.59 | 2 | 0.2 | 0.22 | 2.1 | 0.45 |
| 0.7 | 0.98 | 0.18 | 2.7 | 0.88 | 0.89 | 2.8 | 0.2 | 0.22 | 2.9 | 0.63 |
| 0.8 | 1.5 | 0.37 |
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.
| 3.8 |
| 1.3 |
| 1.41 |
| 4 |
| 0.4 |
| 0.43 |
| 4.2 |
| 1.05 |
| 1 | 2 | 0.37 | 4.8 | 1.7 | 1.91 | 5 | 0.4 | 0.43 | 5.2 | 1.45 |
| 1.2 | 2.5 | 0.37 | 5.8 | 2.1 | 2.41 | 6 | 0.4 | 0.43 | 6.2 | 1.85 |
| 1.5 | 3.2 | 0.56 | 6.8 | 2.8 | 3.08 | 7 | 0.6 | 0.64 | 7.2 | 2.5 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.