4MM CS X 45MM ID BLACK BUNA 70D

Part number H4X45 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 45 mm (1.772 in), a cross section of 4 mm (0.157 in), and an outside diameter of 53 mm (2.09 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists petroleum-based oils, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or automotive brake fluid are present.

It sees regular use in fluid power, hydraulic and pneumatic systems, and agricultural equipment.

Order part number H4X45, sold individually. Unit weight is approximately 2.3998 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.