Buna 70-445-Black-Pk2

This o-ring is supplied in AS568-445 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 7.975 in (202.57 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.525 in (216.54 mm), catalogued under part number SB-H70445-2. It compresses into its gland to block fluid or gas migration across a joint. The catalog record notes: 0.275CSX7.975"IDX8.525"OD.

As a material, Buna-N (Nitrile) delivers the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. Expect good resistance to propane and butane, many alcohols, and greases and lubricants. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Common environments for this compound include automotive, general industrial maintenance, and fluid power.

Order part number SB-H70445-2, sold by the bag. Nominal inside diameter is listed as 8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.