-352 BLACK BUNA 70D O-RING

The H70MD352 is an AS568-352 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 4.85 in (123.19 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.27 in (133.86 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. Expect good resistance to petroleum-based oils, propane and butane, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving automotive brake fluid or ozone and direct sunlight call for a different compound.

This o-ring is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across agricultural equipment, fluid power, and general industrial maintenance.

H70MD352 ships individually. Nominal inside diameter is listed as 4 7/8 inch. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.