-252 BLACK BUNA 50D O-RING

Ordered as H50252, this is an AS568-252 black Buna-N (Nitrile) 50 Shore A O-Ring measuring an inside diameter of 5.234 in (132.94 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.512 in (140 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, most widely specified general-purpose sealing elastomer. This material stands up to water, many alcohols, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving automotive brake fluid or ozone and direct sunlight call for a different compound.

Typical settings include hydraulic and pneumatic systems, agricultural equipment, and automotive.

H50252 ships individually. Nominal inside diameter is listed as 5 1/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.