3MM CS X 149.5MM ID BLACK BUNA 90D

H90M3X149.5 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 149.5 mm (5.886 in), a cross section of 3 mm (0.118 in), and an outside diameter of 155.5 mm (6.12 in). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, low compression set under sustained load. The compound resists many alcohols, petroleum-based oils, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

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

H90M3X149.5 ships individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.