7MM CS X 85MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 85 mm (3.346 in), a cross section of 7 mm (0.276 in), and an outside diameter of 99 mm (3.9 in), catalogued under part number H7X85. It creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is specified here for low compression set under sustained load, strong abrasion and tear resistance. The compound resists propane and butane, many alcohols, and water. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to polar solvents or ketones will shorten service life.

Maintenance and OEM teams specify it across construction equipment, hydraulic and pneumatic systems, and automotive.

H7X85 ships individually. Unit weight is approximately 13.591 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.