Buna 70-244-Black-Pk25

SB-H70244-25 is an AS568-244 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 4.234 in (107.54 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.512 in (114.6 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as 0.139CSX4.234"IDX4.512"OD.

It resists propane and butane, greases and lubricants, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is known for strong abrasion and tear resistance, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to strong acids or automotive brake fluid will shorten service life.

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

Stocked as SB-H70244-25 and sold by the bag. Nominal inside diameter is listed as 4 1/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.