This o-ring is supplied in AS568-244 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 4.234 in (107.54 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.512 in (114.6 mm), catalogued under part number H70MD244. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
This material stands up to many alcohols, water, and hydraulic fluids. Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer and low compression set under sustained load. 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 polar solvents or strong acids are present.
The compound is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include fluid power, agricultural equipment, and construction equipment.
Order part number H70MD244, sold individually. Nominal inside diameter is listed as 4 1/4 inch. Review your operating media and conditions against this specification before installation.
Description -244 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 4.234 inch (107.54 mm)
Actual Outside Diameter 4.512 inch (114.6 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable