2.5MM CS X 38.5MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 38.5 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:
H2.5X38.5
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 38.5 mm (1.516 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 43.5 mm (1.71 in), catalogued under part number H2.5X38.5. It provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. The material holds up against propane and butane, hydraulic fluids, and water. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

It sees regular use in automotive, fluid power, and construction equipment.

Reference part number H2.5X38.5 when ordering; the item is sold individually. 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
H2.5X38.5
Description
2.5MM CS X 38.5MM ID BLACK BUNA 70D
Actual Outside Diameter
43.5 mm (1.71 inch)
Actual Cross Section
2.5 mm (0.098 inch)
Actual Inside Diameter
38.5 mm (1.516 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity