-445 BLACK BUNA 70D O-RING

H70MD445 is an AS568-445 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 7.975 in (202.57 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.525 in (216.54 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to water, propane and butane, and hydraulic fluids. Buna-N (Nitrile) is widely chosen for low compression set under sustained load, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in ketones or polar solvents.

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

Order part number H70MD445, sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. 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.