Buna 70-042-Black-Pk100

APG stocks the SB-H70042-100, an AS568-042 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 3.239 in (82.27 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.379 in (85.83 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as 3.375IDX3.25"ODX.0625"CS.

The material holds up against greases and lubricants, water, and many alcohols. Buna-N (Nitrile) is specified for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or automotive brake fluid.

Maintenance and OEM teams specify it across fluid power, agricultural equipment, and hydraulic and pneumatic systems.

Order part number SB-H70042-100, sold by the bag. Nominal inside diameter is listed as 3 1/4 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.