4MM CS X 145MM ID BLACK BUNA 70D

Buna-N O-Ring, 4 x 145 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:
H4X145
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 145 mm (5.709 in), a cross section of 4 mm (0.157 in), and an outside diameter of 153 mm (6.02 in), catalogued under part number H4X145. It compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is widely chosen for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. It resists greases and lubricants, water, and hydraulic fluids. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ozone and direct sunlight or ketones will shorten service life.

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

This item is sold individually under part number H4X145. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Item
H4X145
Description
4MM CS X 145MM ID BLACK BUNA 70D
Actual Outside Diameter
153 mm (6.02 inch)
Actual Cross Section
4 mm (0.157 inch)
Actual Inside Diameter
145 mm (5.709 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity