5.7MM CS X 57.6MM ID BLACK BUNA 90D

The H90M5.7X57.6 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 57.6 mm (2.268 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 69 mm (2.72 in). This o-ring delivers dependable bidirectional sealing in a compact groove envelope. Supplementary detail from the product record: Metric O-RING, JIS P58.

As a material, Buna-N (Nitrile) offers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The compound resists hydraulic fluids, many alcohols, and propane and butane. 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 ketones or polar solvents are present.

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

Order part number H90M5.7X57.6, sold individually. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.