This o-ring is supplied in black Buna-N (Nitrile) 90 Shore A measuring an inside diameter of 76 mm (2.992 in), a cross section of 3 mm (0.118 in), and an outside diameter of 82 mm (3.23 in), catalogued under part number H90M3X76. It remains the most cost-effective sealing element available for pressurized assemblies.
The compound resists hydraulic fluids, water, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ozone and direct sunlight are present.
Common environments for this compound include fluid power, construction equipment, and agricultural equipment.
Reference part number H90M3X76 when ordering; the item is sold individually. Unit weight is approximately 2.28 g. Review your operating media and conditions against this specification before installation.
description 3MM CS X 76MM ID BLACK BUNA 90D
uf_description2 METRIC O-RING
Actual_OD 82 mm (3.23 inch)
Actual_CS 3 mm (0.118 inch)
Actual_ID 76 mm (2.992 inch)
ProductCode Description O-Rings - Metric - Commodity