3.5MM CS X 38MM ID BLACK BUNA 70D

Ordered as H3.5X38, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 38 mm (1.496 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 45 mm (1.77 in). The o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to water, petroleum-based oils, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or strong acids.

Typical settings include fluid power, hydraulic and pneumatic systems, and automotive.

Reference part number H3.5X38 when ordering; the item is sold individually. Unit weight is approximately 1.53 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.