-157 WHITE BUNA 70D FDA O-RING

Ordered as H70FDA157, this is an AS568-157 white Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 4.487 in (113.97 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.693 in (119.2 mm). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. The compound resists propane and butane, water, and greases and lubricants. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or polar solvents are present.

The compound meets FDA requirements for food contact, is metal detectable for HACCP and foreign-body control programs. It sees regular use in agricultural equipment, fluid power, and construction equipment.

H70FDA157 ships individually. Nominal inside diameter is listed as 4 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to 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.