Standard: DIN 7964
Available sizes: M2.5 to M5 (4 sizes)
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M2.5 | 0.5 | 11.65 | 12.35 | 12.7 | 2.3 | 3.8 | 12 | 0.1 | 12 | 4.5 | 2.1 |
| M3 | 0.8 | 19.58 | 20.42 | 17.3 | 3.9 | 6.25 | 16 |
| 0.2 |
| 20 |
| 7.55 |
| 3.7 |
| M4 | 1.25 | 29.58 | 30.42 | 23.2 | 6.2 | 10 | 22 | 0.4 | 30 | 11.2 | 6 |
| M5 | 1.5 | 35.5 | 36.5 | 27.8 | 7.7 | 12.5 | 26 | 0.4 | 36 | 14.3 | 7.5 |
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.
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.