This o-ring is supplied in AS568-142 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 2.362 in (59.99 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.568 in (65.23 mm), catalogued under part number H70MD142. It creates a positive seal at flange, piston and rod interfaces without added hardware.
The material holds up against many alcohols, petroleum-based oils, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or ketones.
This o-ring is metal detectable for HACCP and foreign-body control programs. It sees regular use in fluid power, general industrial maintenance, and automotive.
Order part number H70MD142, sold individually. Nominal inside diameter is listed as 2 3/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.
Description -142 BLACK BUNA 70D O-RING
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 2.362 inch (59.99 mm)
Actual Outside Diameter 2.568 inch (65.23 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable