4MM CS X 125MM ID BLACK BUNA 70D

Part number H4X125 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 125 mm (4.921 in), a cross section of 4 mm (0.157 in), and an outside diameter of 133 mm (5.24 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is specified for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. It resists hydraulic fluids, many alcohols, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving ketones or strong acids call for a different compound.

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

Order part number H4X125, sold individually. Unit weight is approximately 6.3042 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.