Buna 70-050-Black-Pk10

The SB-H70050-10 is an AS568-050 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 5.239 in (133.07 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 5.379 in (136.63 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces. Additional detail on this item: 5.375IDX5.25"ODX.0625"CS.

The compound resists hydraulic fluids, many alcohols, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ketones or strong acids.

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

This item is sold by the bag under part number SB-H70050-10. Nominal inside diameter is listed as 5 1/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.