This o-ring is supplied in AS568-042 black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 3.239 in (82.27 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.379 in (85.83 mm), catalogued under part number H70042. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. The compound resists propane and butane, petroleum-based oils, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ketones or strong acids.
Typical settings include construction equipment, general industrial maintenance, and automotive.
Order part number H70042, sold individually. Unit weight is approximately 0.819 g and nominal inside diameter is listed as 3 1/4 inch. Check the compound against your process media, pressure and temperature before committing to a design.
Description -042 BLACK BUNA 70D O-RING
Actual Cross Section 0.07 inch (1.78 mm)
Actual Inside Diameter 3.239 inch (82.27 mm)
Actual Outside Diameter 3.379 inch (85.83 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity