This o-ring is supplied in AS568-441 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 6.975 in (177.17 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.525 in (191.14 mm), catalogued under part number H70MD441. It delivers dependable bidirectional sealing in a compact groove envelope.
As a material, Buna-N (Nitrile) offers low compression set under sustained load, reliable performance in both static and dynamic service. The compound resists propane and butane, water, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or automotive brake fluid will shorten service life.
The compound is metal detectable for HACCP and foreign-body control programs. You will find this material specified across fluid power, automotive, and construction equipment.
H70MD441 ships individually. Nominal inside diameter is listed as 7 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description -441 BLACK BUNA 70D O-RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 6.975 inch (177.17 mm)
Actual Outside Diameter 7.525 inch (191.14 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable