2.5MM CS X 4MM ID BLACK BUNA 70D

Buna-N O-Ring, 2.5 x 4 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:
H2.5X4
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Product Specification

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Part number H2.5X4 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 4 mm (0.157 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 9 mm (0.35 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer, reliable performance in both static and dynamic service. This material stands up to water, hydraulic fluids, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with polar solvents or strong acids.

Typical settings include agricultural equipment, general industrial maintenance, and hydraulic and pneumatic systems.

This item is sold individually under part number H2.5X4. Unit weight is approximately 0.125 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Item
H2.5X4
Description
2.5MM CS X 4MM ID BLACK BUNA 70D
Actual Outside Diameter
9 mm (0.35 inch)
Actual Cross Section
2.5 mm (0.098 inch)
Actual Inside Diameter
4 mm (0.157 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity