3.5MM CS X 19MM ID BLACK BUNA 70D

APG stocks the H3.5X19, a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 19 mm (0.748 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 26 mm (1.02 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to hydraulic fluids, greases and lubricants, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen 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 is not the right choice where automotive brake fluid or ozone and direct sunlight are present.

Common environments for this compound include hydraulic and pneumatic systems, general industrial maintenance, and automotive.

Reference part number H3.5X19 when ordering; the item is sold individually. Unit weight is approximately 0.83 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.