3.5MM CS X 103MM ID BLACK BUNA 70D

Ordered as H3.5X103, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 103 mm (4.055 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 110 mm (4.33 in). The o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

This material stands up to water, hydraulic fluids, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for strong abrasion and tear resistance, 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).

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

H3.5X103 ships individually. Review your operating media and conditions against this specification before installation.