-255 BLACK BUNA 70D O-RING

APG stocks the H70MD255, an AS568-255 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 5.609 in (142.47 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.887 in (149.53 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is valued for low compression set under sustained load and an economical choice for high-volume maintenance programs. The compound resists hydraulic fluids, greases and lubricants, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with polar solvents or ketones.

This item is metal detectable for HACCP and foreign-body control programs. It sees regular use in agricultural equipment, automotive, and general industrial maintenance.

H70MD255 ships individually. 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.