3.1MM CS X 109.4MM ID BLACK BUNA 90D

APG stocks the H90M3.1X109.4, a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 109.4 mm (4.307 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 115.6 mm (4.55 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. The catalog record notes: Metric O-RING, JIS G110.

Buna-N (Nitrile) offers reliable performance in both static and dynamic service, strong abrasion and tear resistance. The compound resists petroleum-based oils, many alcohols, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with automotive brake fluid or strong acids.

Typical settings include general industrial maintenance, construction equipment, and automotive.

H90M3.1X109.4 ships individually. Unit weight is approximately 3.6955 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.