4.5MM CS X 41MM ID BLACK BUNA 70D

Part number H4.5X41 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 41 mm (1.614 in), a cross section of 4.5 mm (0.177 in), and an outside diameter of 50 mm (1.97 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The material holds up against greases and lubricants, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with ketones or automotive brake fluid.

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

This item is sold individually under part number H4.5X41. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.