(0.66 € No tax)
NBR or Viton O-ring, in all diameters and cross-sections.
O-rings sold individually, in NBR (nitrile rubber), 90 Shore NBR or Viton (FKM). You choose the inside diameter, the thickness (cross-section) and the material.
NBR is the usual material for mineral hydraulic oil, grease and compressed air. Viton withstands higher temperatures and several fuels and chemicals that attack NBR. 90 Shore NBR is harder and resists extrusion better at high pressure.
To choose, measure the inside diameter and the thickness of the old O-ring with a calliper, without stretching it. If the O-ring sits in a groove, the groove dimensions are also a good reference.
Specific References
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