2MM CS X 99MM ID BLACK BUNA 70D

H2X99 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 99 mm (3.898 in), a cross section of 2 mm (0.079 in), and an outside diameter of 103 mm (4.06 in). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The compound resists greases and lubricants, hydraulic fluids, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or strong acids.

You will find this material specified across agricultural equipment, construction equipment, and general industrial maintenance.

Order part number H2X99, sold individually. Unit weight is approximately 1.218 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.