5.7MM CS X 159.3MM ID BLACK BUNA 90D

Ordered as H90M5.7X159.3, this is a black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 159.3 mm (6.272 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 170.7 mm (6.72 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies. Supplementary detail from the product record: Metric O-RING, JIS G160.

The compound resists water, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for low compression set under sustained load, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to polar solvents or automotive brake fluid will shorten service life.

Common environments for this compound include fluid power, agricultural equipment, and hydraulic and pneumatic systems.

Order part number H90M5.7X159.3, sold individually. Unit weight is approximately 18.347 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.