Standard: DIN 9045 - 1974
Available sizes: 10 to 8 (7 sizes)
| Size | P | k_max | k_min | s_max | s_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|
| 10 | 20.2 | 10 | 59.7 | 20.35 | 20.05 | 2 | 1.47 |
| 12 | 23.2 | 10 | 69 | 23.35 | 23.05 | 2 | 1.7 |
| 4 | 4.4 | 2.5 | 13.8 | 4.5 | 4.3 | 0.8 | 0.054 |
| 5 | 6.2 | 4 | 18 |
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.
| 6.3 |
| 6.1 |
| 0.8 |
| 0.071 |
| 6 | 9.2 | 4 | 27.4 | 9.3 | 9.1 | 0.8 | 0.108 |
| 7 | 13 | 6 | 38 | 13.1 | 12.9 | 1 | 0.234 |
| 8 | 16.5 | 6 | 50.9 | 16.6 | 16.4 | 1.6 | 0.804 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.