Buna 70-140-Black-Pk10

APG stocks the SB-H70140-10, an AS568-140 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 2.237 in (56.82 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.443 in (62.05 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. This item is further identified as 0.103CSX2.237"IDX2.443"OD.

It resists water, greases and lubricants, and petroleum-based oils. Buna-N (Nitrile) is specified for low compression set under sustained load, 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. It should not be specified for service in automotive brake fluid or polar solvents.

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

Reference part number SB-H70140-10 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 2 1/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.