Buna 70-155-Black-Pk50

APG stocks the SB-H70155-50, an AS568-155 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 3.987 in (101.27 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.193 in (106.5 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. The catalog record notes: 4.1875IDX4"ODX.0938"CS.

Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer and low compression set under sustained load. It resists propane and butane, water, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or strong acids.

You will find this material specified across agricultural equipment, hydraulic and pneumatic systems, and general industrial maintenance.

This item is sold by the bag under part number SB-H70155-50. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.