-045 BLACK BUNA 50D O-RING

Ordered as H50045, this is an AS568-045 black Buna-N (Nitrile) 50 Shore A O-Ring supplied with an inside diameter of 3.989 in (101.32 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 4.129 in (104.88 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against water, hydraulic fluids, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) delivers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or polar solvents.

You will find this material specified across agricultural equipment, fluid power, and hydraulic and pneumatic systems.

Stocked as H50045 and sold individually. Nominal inside diameter is listed as 4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. 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.