H70FDA235 is an AS568-235 white Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 3.109 in (78.97 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.387 in (86.03 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.
Expect good resistance to petroleum-based oils, hydraulic fluids, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).
This item meets FDA requirements for food contact under 21 CFR 177.2600. Maintenance and OEM teams specify it across general industrial maintenance, hydraulic and pneumatic systems, and automotive.
Order part number H70FDA235, sold individually. Unit weight is approximately 3.18 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description -235 WHITE BUNA 70D FDA O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.109 inch (78.97 mm)
Actual Outside Diameter 3.387 inch (86.03 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable