1MM CS X 2.5MM ID BLACK BUNA 70D

H1X2.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 2.5 mm (0.098 in), a cross section of 1 mm (0.039 in), and an outside diameter of 4.5 mm (0.18 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. The material holds up against many alcohols, hydraulic fluids, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where polar solvents or strong acids are present.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and fluid power.

Order part number H1X2.5, sold individually. Unit weight is approximately 0.0109 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.