Standard: DIN 6902
Available sizes: M2.5 to M5 (5 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 97.4(N) |
| DIN | DIN EN ISO 10673(N) |
| ISO | ISO 10673(N) |
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| M2.5 | 2.75 | 0.6 | 0.65 | 2.85 | 7 | 0.15 | 6.78 |
| 0.55 |
| M3 | 3.6 | 0.8 | 0.85 | 3.72 | 9 | 0.34 | 8.78 | 0.75 |
| M3.5 | 5.5 | 1.6 | 1.68 | 5.62 | 12 | 1.12 | 11.73 | 1.52 |
| M4 | 9.3 | 2.5 | 2.6 | 9.52 | 20 | 4.83 | 19.67 | 2.4 |
| M5 | 11 | 3 | 3.11 | 11.27 | 24 | 8.41 | 23.67 | 2.89 |
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.