This o-ring is supplied in AS568-243 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 4.109 in (104.37 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.387 in (111.43 mm), catalogued under part number H70243. It delivers dependable bidirectional sealing in a compact groove envelope.
It resists petroleum-based oils, hydraulic fluids, and many alcohols. Buna-N (Nitrile) is valued for low compression set under sustained load and an economical choice for high-volume maintenance programs. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or strong acids.
Typical settings include fluid power, automotive, and agricultural equipment.
Order part number H70243, sold individually. Unit weight is approximately 4.117 g. 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 -243 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 4.109 inch (104.37 mm)
Actual Outside Diameter 4.387 inch (111.43 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity