The H90240 is an AS568-240 black Buna-N (Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 3.734 in (94.84 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.012 in (101.9 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.
The material holds up against many alcohols, hydraulic fluids, and propane and butane. Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, 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 ketones or automotive brake fluid.
It sees regular use in hydraulic and pneumatic systems, construction equipment, and automotive.
Order part number H90240, sold individually. Unit weight is approximately 4.004 g and nominal inside diameter is listed as 3 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description -240 BLACK BUNA 90D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.734 inch (94.84 mm)
Actual Outside Diameter 4.012 inch (101.9 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity