DIN 6796 specifies conical spring washers, also known as Belleville washers, designed for high preload and load-cycling applications. These washers provide elastic recovery to compensate for settling effects in bolted joints, ensuring long-term tension and vibration resistance.
Commonly used in high-stress bolted connections, DIN 6796 washers help prevent loosening due to dynamic loads, thermal expansion, and relaxation. They are widely used in the automotive, mechanical engineering, power transmission, and structural industries.
Key Characteristics
✔ High Elasticity: Provides excellent tension retention in bolted assemblies.
✔ Prevents Loosening: Maintains consistent preload in dynamic load conditions.
✔ Resistant to Relaxation: Compensates for settling and thermal expansion.
✔ Material Options: Available in spring steel (HV 300, HV 500) and stainless steel.
✔ Applications: Power transmission, flanged connections, and machinery fasteners.
Dimensions and Load Ratings for DIN 6796 Conical Spring Washers
| Nominal Size (d) | Inner Diameter (d1) (mm) | Outer Diameter (d2) (mm) | Thickness (s) (mm) | Load at Flat (N) | Spring Deflection (mm) |
|---|---|---|---|---|---|
| M5 | 5.3 | 10.0 | 1.0 | 1900 | 0.30 |
| M6 | 6.4 | 12.0 | 1.5 | 3200 | 0.40 |
| M8 | 8.4 | 16.0 | 2.0 | 5700 | 0.50 |
| M10 | 10.5 | 20.0 | 2.5 | 9300 | 0.60 |
| M12 | 13.0 | 24.0 | 3.0 | 14400 | 0.75 |
| M16 | 17.0 | 30.0 | 4.0 | 25000 | 1.00 |
| M20 | 21.0 | 38.0 | 5.0 | 41000 | 1.25 |
| M24 | 25.4 | 44.0 | 6.0 | 58000 | 1.50 |
📌 Load values are approximate and subject to variation based on material properties.
Applications of DIN 6796 Conical Spring Washers
- Power Transmission & Gearboxes – Ensures secure fastening under dynamic loads.
- Heavy Machinery & Equipment – Prevents loosening in high-vibration environments.
- Flange & Pipe Connections – Maintains bolt tension in pressurized systems.
- Automotive & Aerospace – Used in engine mounts, suspension systems, and structural joints.
- Steel Construction & Bridges – Provides long-term bolt stability under load variations.
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.