The H50439 is an AS568-439 black Buna-N (Nitrile) 50 Shore A O-Ring built to an inside diameter of 6.475 in (164.47 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.025 in (178.44 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope.
Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. This material stands up to propane and butane, greases and lubricants, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or strong acids are present.
Typical settings include hydraulic and pneumatic systems, automotive, and general industrial maintenance.
This item is sold individually under part number H50439. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. 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.
Description -439 BLACK BUNA 50D O-RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 6.475 inch (164.47 mm)
Actual Outside Diameter 7.025 inch (178.44 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity