4.5MM CS X 17MM ID BLACK BUNA 70D

Ordered as H4.5X17, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 17 mm (0.669 in), a cross section of 4.5 mm (0.177 in), and an outside diameter of 26 mm (1.02 in). The o-ring compresses into its gland to block fluid or gas migration across a joint.

The compound resists petroleum-based oils, hydraulic fluids, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Continuous operating temperature is published at -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 automotive, agricultural equipment, and general industrial maintenance.

Reference part number H4.5X17 when ordering; the item is sold individually. 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.