Buna 70-145-Black-Pk10

Ordered as SB-H70145-10, this is an AS568-145 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 2.55 in (64.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.756 in (70 mm). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. The catalog record notes: 0.103CSX2.550"IDX2.756"OD.

Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, low compression set under sustained load. The material holds up against petroleum-based oils, hydraulic fluids, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or automotive brake fluid are present.

Typical settings include general industrial maintenance, construction equipment, and fluid power.

Reference part number SB-H70145-10 when ordering; the item is sold by the bag. Nominal inside diameter is listed as 2 9/16 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.