H90408 is an AS568-408 black Buna-N (Nitrile) 90 Shore A O-Ring measuring an inside diameter of 2.35 in (59.69 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 2.9 in (73.66 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.
The material holds up against water, propane and butane, and many alcohols. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where strong acids or ozone and direct sunlight are present.
You will find this material specified across construction equipment, automotive, and hydraulic and pneumatic systems.
Order part number H90408, sold individually. Unit weight is approximately 10.62 g. 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 -408 BLACK BUNA 90D O-RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 2.35 inch (59.69 mm)
Actual Outside Diameter 2.9 inch (73.66 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity