Ordered as H2.5X34, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 34 mm (1.339 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 39 mm (1.54 in). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
The compound resists greases and lubricants, propane and butane, and water. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).
You will find this material specified across agricultural equipment, hydraulic and pneumatic systems, and construction equipment.
Reference part number H2.5X34 when ordering; the item is sold individually. Unit weight is approximately 0.687 g. 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.
Description 2.5MM CS X 34MM ID BLACK BUNA 70D
Actual Outside Diameter 39 mm (1.54 inch)
Actual Cross Section 2.5 mm (0.098 inch)
Actual Inside Diameter 34 mm (1.339 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity