3.5MM CS X 30.7MM ID BLACK BUNA 90D

APG stocks the H90M3.5X30.7, a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 30.7 mm (1.209 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 37.7 mm (1.48 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope. Supplementary detail from the product record: Metric O-RING, JIS P31.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. The compound resists hydraulic fluids, petroleum-based oils, and greases and lubricants. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or polar solvents will shorten service life.

Common environments for this compound include fluid power, general industrial maintenance, and automotive.

Stocked as H90M3.5X30.7 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. 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.