APG stocks the H70MD409, an AS568-409 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 2.475 in (62.87 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 3.025 in (76.84 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.
Expect good resistance to petroleum-based oils, propane and butane, and greases and lubricants. Buna-N (Nitrile) is known for low compression set under sustained load, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving polar solvents or automotive brake fluid call for a different compound.
This item is metal detectable for HACCP and foreign-body control programs. It sees regular use in hydraulic and pneumatic systems, fluid power, and construction equipment.
Stocked as H70MD409 and sold individually. Nominal inside diameter is listed as 2 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description -409 BLACK BUNA 70D O-RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 2.475 inch (62.87 mm)
Actual Outside Diameter 3.025 inch (76.84 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable