3.1MM CS X 74.4MM ID BLACK BUNA 90D

H90M3.1X74.4 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 74.4 mm (2.929 in), a cross section of 3.1 mm (0.122 in), and an outside diameter of 80.6 mm (3.17 in). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. Supplementary detail from the product record: Metric O-RING, JIS G75.

This material stands up to greases and lubricants, hydraulic fluids, and water. Buna-N (Nitrile) delivers strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to ketones or strong acids will shorten service life.

Typical settings include construction equipment, fluid power, and agricultural equipment.

Stocked as H90M3.1X74.4 and sold individually. Unit weight is approximately 2.5348 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.