Standard: NF E 27
Available sizes: (7) to 6 (5 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| (7) | 16 | 28 | 28.3 | 16.3 | 36 | 36.3 | 0.4 |
| 3 | 4.5 | 8 | 8.3 | 4.8 | 11 | 11.3 | 0.25 |
| 4 | 7 | 12 | 12.3 | 7.3 | 16 | 16.3 | 0.3 |
| 5 | 9 | 16 | 16.3 |
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.
| 9.3 |
| 22 |
| 22.3 |
| 0.3 |
| 6 | 14 | 24 | 24.3 | 14.3 | 32 | 32.3 | 0.4 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.