-421 BLACK BUNA 70D O-RING

H70MD421 is an AS568-421 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 3.975 in (100.97 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.525 in (114.94 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Expect good resistance to many alcohols, greases and lubricants, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or strong acids are present.

The compound is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include general industrial maintenance, fluid power, and automotive.

Reference part number H70MD421 when ordering; the item is sold individually. Nominal inside diameter is listed as 4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.