Profile sealing rings according to DIN 3869

Profile sealing rings according to DIN 3869 are static sealing elements primarily used in hydraulic and pneumatic screw connections.
They are typically made of elastomeric materials such as NBR (nitrile rubber) or FKM (Viton) and serve to seal between metallic components, e.g., between a threaded fitting and a housing.

Their typical geometry is ring-shaped with a rectangular cross-section and a profiled sealing edge, which enables high sealing performance even at low tightening torques.
The DIN 3869 standard defines the dimensions, tolerances, and application conditions for these seals, ensuring interchangeability and functional reliability.

These seals are often used in conjunction with fittings according to DIN 2353 or similar systems.