-139 BLACK BUNA 70D O-RING

Part number H70139 is an AS568-139 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 2.175 in (55.25 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.381 in (60.48 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, most widely specified general-purpose sealing elastomer. The compound resists many alcohols, water, and hydraulic fluids. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across agricultural equipment, fluid power, and general industrial maintenance.

Order part number H70139, sold individually. Unit weight is approximately 1.2289 g and nominal inside diameter is listed as 2 3/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.