4MM CS X 117MM ID BLACK BUNA 90D

This o-ring is supplied in black Buna-N (Nitrile) 90 Shore A with an inside diameter of 117 mm (4.606 in), a cross section of 4 mm (0.157 in), and an outside diameter of 125 mm (4.92 in), catalogued under part number H90M4X117. It compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is valued for strong abrasion and tear resistance, low compression set under sustained load. The material holds up against petroleum-based oils, hydraulic fluids, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with automotive brake fluid or ketones.

It sees regular use in general industrial maintenance, automotive, and fluid power.

Reference part number H90M4X117 when ordering; the item is sold individually. Unit weight is approximately 0.09 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.