3MM CS X 296MM ID BLACK BUNA 70D

Buna-N O-Ring, 3 x 296 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:
H3X296
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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 296 mm (11.654 in), a cross section of 3 mm (0.118 in), and an outside diameter of 302 mm (11.89 in), catalogued under part number H3X296. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is specified here for low compression set under sustained load, reliable performance in both static and dynamic service. The compound resists propane and butane, greases and lubricants, and water. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where strong acids or automotive brake fluid are present.

Typical settings include general industrial maintenance, automotive, and construction equipment.

Reference part number H3X296 when ordering; the item is sold individually. Unit weight is approximately 8.1 g. 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
H3X296
Description
3MM CS X 296MM ID BLACK BUNA 70D
Actual Outside Diameter
302 mm (11.89 inch)
Actual Cross Section
3 mm (0.118 inch)
Actual Inside Diameter
296 mm (11.654 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity