3MM CS X 48MM ID BLACK BUNA 90D

Ordered as H90M3X48, this is a black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 48 mm (1.89 in), a cross section of 3 mm (0.118 in), and an outside diameter of 54 mm (2.13 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The compound resists petroleum-based oils, hydraulic fluids, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across automotive, general industrial maintenance, and fluid power.

Reference part number H90M3X48 when ordering; the item is sold individually. Unit weight is approximately 1.54 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.