-449 BLACK BUNA 50D O-RING

Part number H50449 is an AS568-449 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 9.975 in (253.37 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 10.525 in (267.34 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, low compression set under sustained load. Expect good resistance to petroleum-based oils, hydraulic fluids, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or strong acids are present.

Maintenance and OEM teams specify it across construction equipment, agricultural equipment, and automotive.

Reference part number H50449 when ordering; the item is sold individually. 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.