Standard: JIS D 2101
Available sizes: R 1/4 to R 3/8 (3 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| R 1/4 | 8.16 | 19.8 | 13.5 | 14 | 13.73 | 15 | 15.4 | 10.4 | 9.6 | 14.6 | 10 |
| R 1/8 | 6.01 | 14.1 | 9.8 | 10 | 9.78 | 11 | 11.4 |
| 8.4 |
| 7.6 |
| 10.6 |
| 8 |
| R 3/8 | 10.39 | 26.9 | 18 | 19 | 18.67 | 19 | 19.4 | 12.4 | 11.6 | 18.6 | 12 |
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.