3MM CS X 51MM ID BLACK BUNA 70D

APG stocks the H3X51, a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 51 mm (2.008 in), a cross section of 3 mm (0.118 in), and an outside diameter of 57 mm (2.24 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is specified for strong abrasion and tear resistance, low compression set under sustained load. The compound resists many alcohols, water, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

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

This item is sold individually under part number H3X51. Unit weight is approximately 0.0016 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. 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.