Buna 70-443-Black-Pk2

Ordered as SB-H70443-2, this is an AS568-443 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 7.475 in (189.87 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.025 in (203.84 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint. Additional detail on this item: 0.275CSX7.475"IDX8.025"OD.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, low compression set under sustained load. Expect good resistance to hydraulic fluids, water, and petroleum-based oils. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or strong acids call for a different compound.

Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and construction equipment.

SB-H70443-2 ships by the bag. Check the compound against your process media, pressure and temperature before committing to a design.