The HSN90401 is an AS568-401 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 1.475 in (37.47 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 2.025 in (51.44 mm). This o-ring compresses into its gland to block fluid or gas migration across a joint.
HNBR (Hydrogenated Nitrile) is specified here for excellent abrasion and tear strength, improved ozone and weathering resistance over standard nitrile. The material holds up against modern refrigerants, petroleum oils and fuels, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where strong oxidizing acids or esters are present.
You will find this material specified across oilfield and downhole equipment, automotive air conditioning, and commercial refrigeration.
Order part number HSN90401, 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.
Description 568-401 HSN90 DURO ORINGS
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 1.475 inch (37.47 mm)
Actual Outside Diameter 2.025 inch (51.44 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium