568-108 HSN90 DURO ORINGS

APG stocks the HSN90108, an AS568-108 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring measuring an inside diameter of 0.237 in (6.02 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.443 in (11.25 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

It resists sour gas and amine inhibitors, modern refrigerants, and heat and oxidation. HNBR (Hydrogenated Nitrile) is widely chosen for improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Exposure to ketones or esters will shorten service life.

Maintenance and OEM teams specify it across oilfield and downhole equipment, heavy-duty powertrain, and engine timing systems.

Order part number HSN90108, sold individually. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.