-364 BLACK BUNA 70D O-RING

H70MD364 is an AS568-364 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 6.725 in (170.82 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 7.145 in (181.48 mm). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to petroleum-based oils, water, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, reliable performance in both static and dynamic service. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Applications involving ozone and direct sunlight or ketones call for a different compound.

This o-ring is metal detectable for HACCP and foreign-body control programs. Typical settings include automotive, construction equipment, and fluid power.

Reference part number H70MD364 when ordering; the item is sold individually. Nominal inside diameter is listed as 6 3/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.