This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 61.5 mm (2.421 in), a cross section of 3.55 mm (0.14 in), and an outside diameter of 68.6 mm (2.7 in), catalogued under part number H3.55X61.5. It compresses into its gland to block fluid or gas migration across a joint.
The material holds up against hydraulic fluids, propane and butane, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for strong abrasion and tear resistance, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.
Typical settings include construction equipment, hydraulic and pneumatic systems, and agricultural equipment.
This item is sold individually under part number H3.55X61.5. Unit weight is approximately 2.467 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 3.55MM CS X 61.5MM ID BLACK BUNA 70D
uf_description2 METRIC O-RING
Actual_OD 68.6 mm (2.7 inch)
Actual_CS 3.55 mm (0.14 inch)
Actual_ID 61.5 mm (2.421 inch)
ProductCode Description O-Rings - Metric - Commodity