HSN (HNBR) 80 568-439

HSN80439 is an AS568-439 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring supplied with an inside diameter of 6.475 in (164.47 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.025 in (178.44 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

As a material, HNBR (Hydrogenated Nitrile) is known for the oil resistance of nitrile with substantially better heat capability, improved ozone and weathering resistance over standard nitrile. The compound resists ozone and weathering, petroleum oils and fuels, and modern refrigerants. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where ketones or esters are present.

Maintenance and OEM teams specify it across commercial refrigeration, automotive air conditioning, and engine timing systems.

Order part number HSN80439, sold individually. Unit weight is approximately 0.0261 g. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.