3.5MM CS X 273MM ID BLACK BUNA 70D

Buna-N O-Ring, 3.5 x 273 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
1 Nov 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:
H3.5X273
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Product Specification

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The H3.5X273 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 273 mm (10.748 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 280 mm (11.02 in). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Expect good resistance to greases and lubricants, petroleum-based oils, and water. Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer and low compression set under sustained load. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in automotive brake fluid or strong acids.

You will find this material specified across general industrial maintenance, construction equipment, and fluid power.

This item is sold individually under part number H3.5X273. Unit weight is approximately 10.2904 g. Review your operating media and conditions against this specification before installation.
Item
H3.5X273
Description
3.5MM CS X 273MM ID BLACK BUNA 70D
Actual Outside Diameter
280 mm (11.02 inch)
Actual Cross Section
3.5 mm (0.138 inch)
Actual Inside Diameter
273 mm (10.748 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity