H50309 is an AS568-309 black Buna-N (Nitrile) 50 Shore A O-Ring built to an inside diameter of 0.412 in (10.46 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 0.832 in (21.13 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. It resists hydraulic fluids, greases and lubricants, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in polar solvents or strong acids.
Typical settings include automotive, hydraulic and pneumatic systems, and general industrial maintenance.
H50309 ships individually. Nominal inside diameter is listed as 7/16 inch. Review your operating media and conditions against this specification before installation. 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 -309 BLACK BUNA 50D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 0.412 inch (10.46 mm)
Actual Outside Diameter 0.832 inch (21.13 )
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity