2.5MM CS X 66MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 66 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
1 Nov 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:
H2.5X66
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Product Specification

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Ordered as H2.5X66, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 66 mm (2.598 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 71 mm (2.8 in). The o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is specified here for low compression set under sustained load, reliable performance in both static and dynamic service. It resists many alcohols, greases and lubricants, and hydraulic fluids. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or strong acids.

You will find this material specified across fluid power, automotive, and hydraulic and pneumatic systems.

H2.5X66 ships individually. Unit weight is approximately 1.3003 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Item
H2.5X66
Description
2.5MM CS X 66MM ID BLACK BUNA 70D
Actual Outside Diameter
71 mm (2.8 inch)
Actual Cross Section
2.5 mm (0.098 inch)
Actual Inside Diameter
66 mm (2.598 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity