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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.