This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A with an inside diameter of 25 mm (0.984 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 32 mm (1.26 in), catalogued under part number H3.5X25. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
Expect good resistance to water, many alcohols, and greases and lubricants. Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or ozone and direct sunlight.
Common environments for this compound include automotive, construction equipment, and fluid power.
Reference part number H3.5X25 when ordering; the item is sold individually. Unit weight is approximately 1.052 g. Check the compound against your process media, pressure and temperature before committing to a design. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description 3.5MM CS X 25MM ID BLACK BUNA 70D
Actual Outside Diameter 32 mm (1.26 inch)
Actual Cross Section 3.5 mm (0.138 inch)
Actual Inside Diameter 25 mm (0.984 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity