3MM CS X 53MM ID BLACK BUNA 70D

H3X53 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 53 mm (2.087 in), a cross section of 3 mm (0.118 in), and an outside diameter of 59 mm (2.32 in). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. The material holds up against petroleum-based oils, propane and butane, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or strong acids call for a different compound.

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

Reference part number H3X53 when ordering; the item is sold individually. Unit weight is approximately 0.0016 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.