The HS70138 is an AS568-138 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 2.112 in (53.64 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.318 in (58.88 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope.
It resists heat and oxidation, ozone and weathering, and petroleum oils and fuels. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) delivers long service life in refrigerant and oilfield duty, improved ozone and weathering resistance over standard nitrile. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service.
Maintenance and OEM teams specify it across commercial refrigeration, engine timing systems, and automotive air conditioning.
Order part number HS70138, sold individually. Nominal inside diameter is listed as 2 1/8 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description 568-138 GREEN HNBR (HSN) 70 ORINGS
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 2.112 inch (53.64 mm)
Actual Outside Diameter 2.318 inch (58.88 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium