Buna 70-227-Black-Pk25

SB-H70227-25 is an AS568-227 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 2.109 in (53.57 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.387 in (60.63 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load. This item is further identified as 0.139CSX2.109"IDX2.387"OD.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The material holds up against many alcohols, hydraulic fluids, and greases and lubricants. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in automotive brake fluid or ozone and direct sunlight.

Maintenance and OEM teams specify it across fluid power, hydraulic and pneumatic systems, and agricultural equipment.

Order part number SB-H70227-25, sold by the bag. Nominal inside diameter is listed as 2 1/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.