4.5MM CS X 76MM ID BLACK BUNA 70D

The H4.5X76 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 76 mm (2.992 in), a cross section of 4.5 mm (0.177 in), and an outside diameter of 85 mm (3.35 in). This o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to water, hydraulic fluids, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Exposure to ozone and direct sunlight or polar solvents will shorten service life.

Typical settings include general industrial maintenance, automotive, and construction equipment.

Order part number H4.5X76, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.