-201 BLACK BUNA 90D O-RING

Part number H90201 is an AS568-201 black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 0.171 in (4.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.449 in (11.4 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Expect good resistance to propane and butane, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with ozone and direct sunlight or ketones.

It sees regular use in construction equipment, automotive, and general industrial maintenance.

Order part number H90201, sold individually. Unit weight is approximately 0.327 g and nominal inside diameter is listed as 3/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.