-218 BLACK BUNA 90D O-RING

H90218 is an AS568-218 black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 1.234 in (31.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.512 in (38.4 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against propane and butane, greases and lubricants, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) offers 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). Exposure to ketones or ozone and direct sunlight will shorten service life.

Typical settings include fluid power, hydraulic and pneumatic systems, and automotive.

Reference part number H90218 when ordering; the item is sold individually. Unit weight is approximately 1.5113 g and nominal inside diameter is listed as 1 1/4 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.