4MM CS X 65MM ID BLACK BUNA 70D

Buna-N O-Ring, 4 x 65 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:
H4X65
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A with an inside diameter of 65 mm (2.559 in), a cross section of 4 mm (0.157 in), and an outside diameter of 73 mm (2.87 in), catalogued under part number H4X65. It delivers dependable bidirectional sealing in a compact groove envelope.

Expect good resistance to petroleum-based oils, propane and butane, and water. Buna-N (Nitrile) is known for low compression set under sustained load and an economical choice for high-volume maintenance programs. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

Common environments for this compound include automotive, agricultural equipment, and hydraulic and pneumatic systems.

Stocked as H4X65 and sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Item
H4X65
Description
4MM CS X 65MM ID BLACK BUNA 70D
Actual Outside Diameter
73 mm (2.87 inch)
Actual Cross Section
4 mm (0.157 inch)
Actual Inside Diameter
65 mm (2.559 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity