5.7MM CS X 259.3MM ID BLACK BUNA 90D

This o-ring is supplied in black Buna-N (Nitrile) 90 Shore A measuring an inside diameter of 259.3 mm (10.209 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 270.7 mm (10.66 in), catalogued under part number H90M5.7X259.3. It creates a positive seal at flange, piston and rod interfaces without added hardware. This item is further identified as Metric O-RING, JIS G260.

Expect good resistance to hydraulic fluids, greases and lubricants, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Typical settings include construction equipment, hydraulic and pneumatic systems, and fluid power.

Order part number H90M5.7X259.3, sold individually. Unit weight is approximately 29.053 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.