3.1MM CS X 89.4MM ID BLACK BUNA 90D

Part number H90M3.1X89.4 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 89.4 mm (3.52 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 95.6 mm (3.76 in). An o-ring compresses into its gland to block fluid or gas migration across a joint. Supplementary detail from the product record: Metric O-RING, JIS G90.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. Expect good resistance to greases and lubricants, many alcohols, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, general industrial maintenance, and automotive.

Stocked as H90M3.1X89.4 and sold individually. Unit weight is approximately 3.1239 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.