-259 BLACK BUNA 70D O-RING

Part number H70MD259 is an AS568-259 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 6.234 in (158.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.512 in (165.4 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. The material holds up against water, hydraulic fluids, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or strong acids call for a different compound.

This o-ring is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.

H70MD259 ships individually. Review your operating media and conditions against this specification before installation.