6MM CS X 90MM ID BLACK BUNA 70D

APG stocks the H6X90, a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 90 mm (3.543 in), a cross section of 6 mm (0.236 in), and an outside diameter of 102 mm (4.02 in). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to many alcohols, petroleum-based oils, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ozone and direct sunlight are present.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and fluid power.

Order part number H6X90, sold individually. Unit weight is approximately 10.43 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.