6.99MM CS X 272.4MM ID BLACK BUNA 70D

Buna-N O-Ring, 6.99 x 272.4 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:
H6.99X272.4
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 272.4 mm (10.724 in), a cross section of 6.99 mm (0.275 in), and an outside diameter of 286.38 mm (11.27 in), catalogued under part number H6.99X272.4. It remains the most cost-effective sealing element available for pressurized assemblies.

The compound resists petroleum-based oils, hydraulic fluids, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and low compression set under sustained load. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

Typical settings include hydraulic and pneumatic systems, automotive, and fluid power.

Stocked as H6.99X272.4 and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Item
H6.99X272.4
Description
6.99MM CS X 272.4MM ID BLACK BUNA 70D
Actual Outside Diameter
286.38 mm (11.27 inch)
Actual Cross Section
6.99 mm (0.275 inch)
Actual Inside Diameter
272.4 mm (10.724 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity