DIN 6915 is a German standard that specifies high-strength hex nuts with large widths across flats, primarily used in structural steel connections. These nuts are designed to be used with DIN 6914 high-strength bolts and DIN 6916 washers to form preloaded bolted assemblies in steel structures such as bridges, buildings, and industrial frameworks.
Compared to standard hex nuts, DIN 6915 nuts have a larger width across flats (s) and a greater height (m) to provide increased strength and durability under extreme loads. These nuts are commonly manufactured from high-tensile steel and undergo a heat treatment process to achieve property class 10 as per ISO 898-2.
Key Characteristics
✔ High-Strength Material: Manufactured from high-tensile steel for load-bearing applications.
✔ Large Width Across Flats: Designed to withstand high tightening torques.
✔ Compatible with Structural Bolts: Used with DIN 6914 bolts and DIN 6916 washers.
✔ Heat-Treated for Strength: Achieves property class 10 according to ISO 898-2.
✔ Applications: Structural steel construction, bridge assemblies, and heavy machinery.
Dimensions and Weight Chart for DIN 6915 Hex Nuts
| Nominal Diameter (d) | Pitch (P) | Width Across Flats (s) | Height (m) | Weight (kg/1000 pcs) |
|---|---|---|---|---|
| M12 | 1.75 | 22.00 mm | 10.00 mm | 23.3 |
| M16 | 2.00 | 27.00 mm | 13.00 mm | 44.8 |
| M20 | 2.50 | 32.00 mm | 16.00 mm | 73.9 |
| M22 | 2.50 | 36.00 mm | 18.00 mm | 104.0 |
| M24 | 3.00 | 41.00 mm | 19.00 mm | 155.0 |
| M27 | 3.00 | 46.00 mm | 22.00 mm | 224.0 |
| M30 | 3.50 | 50.00 mm | 24.00 mm | 300.0 |
| M36 | 4.00 | 60.00 mm | 29.00 mm | 515.0 |
📌 Weight values are approximate and based on 1000 pieces.
Applications of DIN 6915 Nuts
- Structural Steel Connections – Used in bridges, steel frames, and high-rise buildings.
- Heavy Machinery Assembly – Provides secure fastening in industrial machines.
- Preloaded Bolted Assemblies – Ensures a firm and vibration-resistant connection.
- Wind Energy & Transmission Towers – Used in turbine structures and power transmission towers.
Standards and Compatibility
Important Notice on Standards Validity
This information is for reference purposes only. Users should consult official sources and updated standards to ensure compliance with current regulations. The validity of standards may change over time, so it is recommended to verify them through recognized engineering and standardization organizations (ISO, DIN, ANSI, etc.).
📌 Check with relevant standardization bodies in your region to confirm whether a specific standard is still valid and applicable. Regulations and industry requirements may vary based on region and application.