Buna 70-203-Black-Pk400

APG stocks the SB-H70203-400, an AS568-203 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 0.296 in (7.52 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 0.574 in (14.58 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as.5625IDX.3125"ODX.125"CS.

It resists hydraulic fluids, many alcohols, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

You will find this material specified across fluid power, agricultural equipment, and construction equipment.

Reference part number SB-H70203-400 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 5/16 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.