4.5MM CS X 105MM ID BLACK BUNA 70D

Ordered as H4.5X105, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 105 mm (4.134 in), a cross section of 4.5 mm (0.177 in), and an outside diameter of 114 mm (4.49 in). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to water, petroleum-based oils, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Common environments for this compound include automotive, construction equipment, and fluid power.

Reference part number H4.5X105 when ordering; the item is sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.