-446 BLACK BUNA 70D O-RING

Ordered as H70MD446, this is an AS568-446 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 8.475 in (215.27 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 9.025 in (229.24 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

This material stands up to propane and butane, water, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is known for low compression set under sustained load and an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -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. It sees regular use in fluid power, general industrial maintenance, and agricultural equipment.

Reference part number H70MD446 when ordering; the item is sold individually. Nominal inside diameter is listed as 8 1/2 inch. Review your operating media and conditions against this specification before installation.