-422 BLACK BUNA 70D O-RING

APG stocks the H70MD422, an AS568-422 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 4.1 in (104.14 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.65 in (118.11 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists water, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with strong acids or automotive brake fluid.

This item is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include general industrial maintenance, construction equipment, and hydraulic and pneumatic systems.

Reference part number H70MD422 when ordering; the item is sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.