Standard: DIN 982 - 1987
Available sizes: M10 to M8 (6 sizes)
| Standard Body | Standard Number |
|---|---|
| GB | GB /T 889.1 |
| NF | NF E 25-409 |
| DIN | DIN EN ISO 7040 |
| ISO | ISO 7040 |
| UNI | UNI 7473 |
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|
| M10 | 2.5 | 13.52 | 16.9 | 21.6 | 27.7 | 2 | 1.5 | 22 | 20.7 | 20 | 32.95 |
| M12 | 3 | 16.16 | 20.2 | 25.9 | 33.2 | 2 | / | 28 | 26.7 | 24 | 39.55 |
| M5 | 1 | 3.92 | 4.9 | 6.75 | 8.9 | / | / | 8 | 7.7 | 6 | 11.05 |
| M6 | 1.25 | 5.15 | 6.44 | 8.75 | 11.6 | 1 | / | 9.5 | 9.14 | 8 | 14.38 |
| M7 | 1.75 | 8.3 | 10.37 | 13 | 17.4 | 1.5 | 1.25 | 14 | 13.64 | 12 | 21.1 |
| M8 | 2 | 11.28 | 14.1 | 17.3 | 22.5 | 1.5 | / | 18 | 17.3 | 16 | 26.75 |
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.