3.5MM CS X 112MM ID BLACK BUNA 70D

Ordered as H3.5X112, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 112 mm (4.409 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 119 mm (4.69 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to many alcohols, petroleum-based oils, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or automotive brake fluid.

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

Order part number H3.5X112, sold individually. Unit weight is approximately 4.263 g. Check the compound against your process media, pressure and temperature before committing to a design. 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.