-358 BLACK BUNA 70D O-RING

This o-ring is supplied in AS568-358 black Buna-N (Nitrile) 70 Shore A with an inside diameter of 5.6 in (142.24 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 6.02 in (152.91 mm), catalogued under part number H70MD358. It creates a positive seal at flange, piston and rod interfaces without added hardware.

The compound resists greases and lubricants, water, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to strong acids or polar solvents will shorten service life.

This item is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across hydraulic and pneumatic systems, agricultural equipment, and construction equipment.

Reference part number H70MD358 when ordering; the item is sold individually. Nominal inside diameter is listed as 5 5/8 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.