3MM CS X 228MM ID BLACK BUNA 70D

APG stocks the H3X228, a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 228 mm (8.976 in), a cross section of 3 mm (0.118 in), and an outside diameter of 234 mm (9.21 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The material holds up against greases and lubricants, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ketones or strong acids.

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

Order part number H3X228, sold individually. Unit weight is approximately 6.573 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.