3.55MM CS X 43.7MM ID BLACK BUNA 70D

H3.55X43.7 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 43.7 mm (1.72 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 50.8 mm (2 in). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.

It resists many alcohols, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or strong acids will shorten service life.

Common environments for this compound include agricultural equipment, hydraulic and pneumatic systems, and automotive.

H3.55X43.7 ships individually. Unit weight is approximately 1.8542 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.