2.5MM CS X 39MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 39 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:
H2.5X39
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Product Specification

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APG stocks the H2.5X39, a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 39 mm (1.535 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 44 mm (1.73 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The compound resists hydraulic fluids, water, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ketones or polar solvents are present.

You will find this material specified across automotive, agricultural equipment, and fluid power.

Reference part number H2.5X39 when ordering; the item is sold individually. Unit weight is approximately 0.7816 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Item
H2.5X39
Description
2.5MM CS X 39MM ID BLACK BUNA 70D
Actual Outside Diameter
44 mm (1.73 inch)
Actual Cross Section
2.5 mm (0.098 inch)
Actual Inside Diameter
39 mm (1.535 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity