H70MD238 is an AS568-238 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 3.484 in (88.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.762 in (95.55 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.
Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Expect good resistance to water, petroleum-based oils, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).
This o-ring is metal detectable for HACCP and foreign-body control programs. You will find this material specified across fluid power, general industrial maintenance, and automotive.
Stocked as H70MD238 and sold individually. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description -238 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.484 inch (88.49 mm)
Actual Outside Diameter 3.762 inch (95.55 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable