2.5MM CS X 79MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 79 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Durometer
70 Shore A
Cross Section Type
Round
Color
Black
Minimum Temperature
-40°F (-40°C)
Maximum Temperature
250°F (121°C)
Unit of Measure
EA
SKU:
H2.5X79
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Product Specification

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Ordered as H2.5X79, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 79 mm (3.11 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 84 mm (3.31 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. Expect good resistance to hydraulic fluids, greases and lubricants, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where polar solvents or ketones are present.

It sees regular use in automotive, hydraulic and pneumatic systems, and construction equipment.

Stocked as H2.5X79 and sold individually. Unit weight is approximately 1.5569 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.
Item
H2.5X79
Description
2.5MM CS X 79MM ID BLACK BUNA 70D
Actual Outside Diameter
84 mm (3.31 inch)
Actual Cross Section
2.5 mm (0.098 inch)
Actual Inside Diameter
79 mm (3.11 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity