-053 BLACK BUNA 70D O-RING

APG stocks the H70053, an AS568-053 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 5.989 in (152.12 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 6.129 in (155.68 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The material holds up against propane and butane, water, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving polar solvents or strong acids call for a different compound.

You will find this material specified across hydraulic and pneumatic systems, fluid power, and automotive.

Stocked as H70053 and sold individually. Unit weight is approximately 1.4917 g and nominal inside diameter is listed as 5 1/4 inch. 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.