DIN EN ISO 7040 Nyloc Nuts
Product introduction
DIN EN ISO 7040 specifies prevailing torque type hexagon regular nuts with a non-metallic polyamide insert. The nylon ring deforms during installation, creating consistent locking torque that effectively resists loosening under vibration. These nuts are available in property classes 5, 8, and 10 for various strength requirements.
Common Specifications
|
Materials |
Carbon steel |
|
Class |
5, 8, 10 |
|
Range |
M3 – M36 |
|
Thread |
Coarse , Fine, Extra Fine, Special-Fine |
|
Surface |
Plain, zinc plated, hot-dip galvanized, GEOMET, ZINC-NICKLE, DACROMATE etc. |
Key Features
- Polyamide insert provides prevailing torque locking
- Regular height for standard mechanical assemblies
- Property classes 5, 8, and 10 for broad application range
- Consistent locking torque through multiple installations
- Conforms to ISO 7040 international standard
Application industry
- Automotive assembly and powertrain
- Industrial machinery with vibration exposure
- Agricultural equipment
- Electrical appliances and control cabinets
data table
| Size | M5 | M6 | M7 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 |
| Coase | 0.8 | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 | 3 | 3 | 3.5 | 3.5 | 4 | 4 |
| Fine | 0.5 | 0.75 | 0.75 | 1 | 1.25 | 1.5 | 1.5 | 1.5 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 |
| Extra Fine | - | - | - | 0.75 | 1 | 1.25 | 1 | 1 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 2 | 2 | - | - |
| s Min (mm) | 7.78 | 9.78 | 10.73 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.16 | 29.16 | 33.00 | 35.00 | 40.00 | 45.00 | 49.00 | 53.80 | 58.80 |
| s Max (mm) | 8.00 | 10.00 | 11.00 | 13.00 | 16.00 | 18.00 | 21.00 | 24.00 | 27.00 | 30.00 | 34.00 | 36.00 | 41.00 | 46.00 | 50.00 | 55.00 | 60.00 |
| e Min (mm) | 8.79 | 11.05 | 12.12 | 14.38 | 17.77 | 20.03 | 23.36 | 26.75 | 29.56 | 32.95 | 37.29 | 39.55 | 45.20 | 50.85 | 55.37 | 60.79 | 66.44 |
| m Min (mm) | 4.80 | 5.40 | 6.84 | 7.14 | 8.94 | 11.57 | 13.40 | 15.70 | 16.90 | 19.00 | 20.50 | 22.60 | 25.40 | 27.30 | 30.90 | 33.10 | 35.90 |
| m Max (mm) | 5.10 | 6.00 | 7.40 | 8.00 | 10.00 | 12.30 | 14.10 | 16.40 | 18.00 | 20.30 | 22.00 | 24.00 | 27.00 | 30.00 | 33.00 | 36.00 | 39.00 |
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