5MM CS X 280MM ID BLACK BUNA 90D

The H90M5X280 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 280 mm (11.024 in), a cross section of 5 mm (0.197 in), and an outside diameter of 290 mm (11.42 in). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists greases and lubricants, water, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

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

Stocked as H90M5X280 and sold individually. Unit weight is approximately 22.878 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.