This o-ring is supplied in AS568-445 black Buna-N (Nitrile) 70 Shore A measuring 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), catalogued under part number H70445. It delivers dependable bidirectional sealing in a compact groove envelope.
The material holds up against water, petroleum-based oils, and propane and butane. Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or polar solvents.
You will find this material specified across fluid power, general industrial maintenance, and automotive.
Reference part number H70445 when ordering; the item is sold individually. Unit weight is approximately 30.55 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
description -445 BLACK BUNA 70D O-RING
uf_description2 0.275" (6.99MM) CS X 7.975" (202.57MM) ID
Actual_CS 0.275 inch (6.99 mm)
Actual_ID 7.975 inch (202.57 mm)
Actual_OD 8.525 inch (216.54 mm)
ProductCode Description O-Rings - Bulk - Commodity