Standard: ISO 7044 - 2012
Available sizes: M10 to M8 (4 sizes)
| Standard Body | Standard Number |
|---|---|
| EN | EN 1664 |
| GB | GB /T 6187.1 |
| DIN | DIN EN 1664 |
| ISO | ISO 7044 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2.5 |
| 10.7 |
| 18.7 |
| 42.8 |
| 39.9 |
| 3 |
| 21.6 |
| 22.4 |
| 20.3 |
| 20 |
| 32.95 |
| M5 | 1 | 3.1 | 5.7 | 14.2 | 12.2 | 1.1 | 6.75 | 7.3 | 6.8 | 6 | 11.05 |
| M6 | 1.5 | 5.6 | 9.64 | 21.8 | 19.6 | 1.5 | 10.8 | 11.4 | 10.34 | 10 | 16.64 |
| M8 | 2 | 7.7 | 13.3 | 29.9 | 27.6 | 2.1 | 15.1 | 15.9 | 14.8 | 14 | 23.36 |
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.