Buna 70-2.5mmCSx22mmID-Black-Pk50

APG stocks the SB-H2.5X22-50, a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 22 mm (0.866 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 27 mm (1.06 in). An o-ring compresses into its gland to block fluid or gas migration across a joint. Source specification: 22MMIDX2.5MMCS.

It resists propane and butane, water, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to polar solvents or ketones will shorten service life.

It sees regular use in fluid power, general industrial maintenance, and agricultural equipment.

Reference part number SB-H2.5X22-50 when ordering; the item is sold by the bag. Check the compound against your process media, pressure and temperature before committing to a design.