Buna 70-349-Black-Pk5

This o-ring is supplied in AS568-349 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 4.475 in (113.67 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.895 in (124.33 mm), catalogued under part number SB-H70349-5. It compresses into its gland to block fluid or gas migration across a joint. Source specification: 0.210CSX4.475"IDX4.895"OD.

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 material holds up against greases and lubricants, water, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in hydraulic and pneumatic systems, fluid power, and agricultural equipment.

Order part number SB-H70349-5, sold by the bag. Nominal inside diameter is listed as 4 1/2 inch. Check the compound against your process media, pressure and temperature before committing to a design.