DIN EN 1666 (DIN) and EN 1666 (EN) are equivalent fastener standards that specify the same or very similar products. Both standards cover 5 fastener types in our database.
DIN EN 1666 (DIN standard) and EN 1666 (EN standard) are equivalent standards that define the same fastener geometry and mechanical requirements. Minor differences may exist in tolerances, marking requirements, or referenced test methods, but the products are interchangeable in most applications. Always verify specific project requirements with your engineer.
| Property | DIN EN 1666 | EN 1666 |
|---|---|---|
| Standard Body | DIN | EN |
| Product Types | 5 fastener types | |
| Interchangeable? | Yes — equivalent standard | |
From: Prevailing Torque Type Hexagon Nuts with Flange (with Non-metallic Insert) with Metricfine Pitch Thread - Product Grades A and B — applies to both DIN EN 1666 and EN 1666
| Size | P | e | r | k_max | k_min | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 1.5 | 13.3 | 16.9 | 14 | 29.9 | 2.1 | 23.36 | 18.2 | 15.1 | 27.6 |
| M12 | 1.5 | 18.7 | 22.7 | 20 | 42.8 |
Both DIN EN 1666 and EN 1666 fasteners are available with various surface treatments. Common options for these standards include:
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.
| ✓ |
| 3 |
| 32.95 |
| 24.8 |
| 21.6 |
| 39.9 |
| M8 | 1 | 9.64 | 12.8 | 10 | 21.8 | 1.5 | 16.64 | 13.5 | 10.8 | 19.6 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.