4MM CS X 175MM ID BLACK BUNA 70D

Part number H4X175 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 175 mm (6.89 in), a cross section of 4 mm (0.157 in), and an outside diameter of 183 mm (7.2 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists petroleum-based oils, greases and lubricants, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or automotive brake fluid call for a different compound.

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

Stocked as H4X175 and sold individually. Unit weight is approximately 8.62 g. Review your operating media and conditions against this specification before installation.