Buna 70-240-Black-Pk50

APG stocks the SB-H70240-50, an AS568-240 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 3.734 in (94.84 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.012 in (101.9 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as 4IDX3.75"ODX.125"CS.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. It resists propane and butane, hydraulic fluids, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where polar solvents or automotive brake fluid are present.

It sees regular use in construction equipment, fluid power, and agricultural equipment.

Order part number SB-H70240-50, sold by the bag. Check the compound against your process media, pressure and temperature before committing to a design.