3.55MM CS X 145MM ID BLACK BUNA 70D

H3.55X145 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 145 mm (5.709 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 152.1 mm (5.99 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

It resists petroleum-based oils, many alcohols, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ozone and direct sunlight or strong acids will shorten service life.

Common environments for this compound include automotive, general industrial maintenance, and agricultural equipment.

Order part number H3.55X145, sold individually. Unit weight is approximately 5.7276 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.