-353 BLACK BUNA 70D O-RING

Ordered as H70MD353, this is an AS568-353 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 4.975 in (126.37 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.395 in (137.03 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) is specified for strong abrasion and tear resistance, reliable performance in both static and dynamic service. It resists petroleum-based oils, greases and lubricants, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or ozone and direct sunlight call for a different compound.

This item is metal detectable for HACCP and foreign-body control programs. You will find this material specified across general industrial maintenance, agricultural equipment, and automotive.

Reference part number H70MD353 when ordering; the item is sold individually. Nominal inside diameter is listed as 5 inch. Review your operating media and conditions against this specification before installation. 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.