5.7MM CS X 189.3MM ID BLACK BUNA 90D

This o-ring is supplied in black Buna-N (Nitrile) 90 Shore A built to an inside diameter of 189.3 mm (7.453 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 200.7 mm (7.9 in), catalogued under part number H90M5.7X189.3. It delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as Metric O-RING, JIS G190.

As a material, Buna-N (Nitrile) is widely chosen for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. This material stands up to petroleum-based oils, many alcohols, and water. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where ozone and direct sunlight or automotive brake fluid are present.

Maintenance and OEM teams specify it across general industrial maintenance, agricultural equipment, and fluid power.

Stocked as H90M5.7X189.3 and sold individually. Unit weight is approximately 21.455 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.