-419 BLACK BUNA 50D O-RING

APG stocks the H50419, an AS568-419 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 3.725 in (94.62 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.275 in (108.59 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Buna-N (Nitrile) is specified for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. The material holds up against water, propane and butane, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or ketones call for a different compound.

Maintenance and OEM teams specify it across general industrial maintenance, automotive, and agricultural equipment.

Order part number H50419, sold individually. Nominal inside diameter is listed as 3 3/4 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.