-159 BLACK BUNA 70D O-RING

Part number H70159 is an AS568-159 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 4.987 in (126.67 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 5.193 in (131.9 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The compound resists propane and butane, water, and many alcohols. 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 strong acids or automotive brake fluid.

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

Reference part number H70159 when ordering; the item is sold individually. Unit weight is approximately 2.68 g and nominal inside diameter is listed as 5 inch. Check the compound against your process media, pressure and temperature before committing to a design.