Metric Fastener Series Bellevilles (DIN 6796)
Bolted joints will work loose, due to a loss of pre-load. This can be caused by permanent set in any part of the assembly. Belleville disc springs will counteract this loosening by increasing the axial compliance of the joint.
lo(max) = height as delivered
lo(min) = height after initial flattening
The material for the part numbers shown is 6150 Alloy Steel. Other materials available include the following.
• 17-4 PH Stainless Steel
• 17-7 PH Stainless Steel
• INCONEL 718 Alloy
• INCONEL X-750 Alloy
Load values vary, based on the material used.