Standard: NF E 22
Available sizes: 10 to 8 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|
| 10 | 22 | 9 | 8.964 | 21.948 | 14 | 1.2 | 63～250 | 13.89 | 1 |
| 2 | 3 | / | / | 2.975 | 3 | 0.25 | 6～36 | 2.975 | 0.16 |
| 3 | 5 | 3 | 2.975 | 4.97 | 5 |
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.
| 0.4 |
| 10～56 |
| 4.97 |
| 0.25 |
| 4 | 8 | 5 | 4.97 | 7.964 | 7 | 0.4 | 18～90 | 6.91 | 0.25 |
| 5 | 12 | 6 | 5.97 | 11.957 | 8 | 0.6 | 28～140 | 7.91 | 0.4 |
| 6 | 16 | 7 | 6.964 | 15.957 | 10 | 0.8 | 45～180 | 9.91 | 0.6 |
| 8 | 20 | 8 | 7.964 | 19.948 | 12 | 0.8 | 56～220 | 11.89 | 0.6 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.