Standard: DIN 3870 - 2001
Available sizes: 10 to 8 (7 sizes)
| Size | P | k_max | k_min | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| 10 | LL | 24.43 | 24.3 | M30*1.5 | 17 | 36 | 24 | 35.8 |
| 12 | LL | 38.47 | 38.31 | M45*1.5 | 19.5 | 50 | 38 | 49.8 |
| 15 | LL | 45.47 | 45.31 | M52*1.5 |
| 20 |
| 60 |
| 45 |
| 59.6 |
| 3 | LL | 6.87 | 6.78 | M10*1 | 11.5 | 12 | 6.5 | 11.8 |
| 5 | LL | 9.87 | 9.78 | M14*1.5 | 14.5 | 17 | 9.5 | 16.8 |
| 6 | LL | 13.9 | 13.79 | M18*1.5 | 15.5 | 22 | 13.5 | 21.8 |
| 8 | LL | — | — | — | 17 | 27 | — | — |
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.