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70 Durometer Buna-N O-Ring, Inch OD, 1-1/4 Inch ID, 0.21 Inch Width

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Description & Features

Manufactured from 70 durometer Buna-N (nitrile) rubber, this o-ring delivers reliable static and dynamic sealing across a broad service temperature range of -40°F to 240°F. Buna-N compound provides strong resistance to petroleum-based fluids, hydraulic oils, and fuels, making it a widely used material in hydraulic and fluid power sealing applications.

The 70 Durometer Buna-N O-Ring carries a dash size of -322, with an actual inside diameter of 1.225 inches, an actual outside diameter of 1.645 inches, and a cross-section width of 0.21 inches. Supplied by Hercules Sealing Products under catalog number C1CF63, it is available in a package quantity of 20.

SKU: A-322

Supplier Part Number (MPN): 568-322

Alternate Part Numbers: C1CF63, MI-08740491, MINO-00407X90491

Specifications

Brand
HERCULES® SEALING PRODUCTS
Color
Black
Cross Section Shape
Round
Dash Size
322
Durometer
70A
Inside Diameter
1-1/4 in
Material
Buna-N
Series
568 Series
Suitable For Use With
Hydraulic Cylinders
System of Measurement
Imperial

Product Questions & Answers (1)

Question by: Tony A on Jul 10, 2025, 5:51 PM
What's the temperature range on these o-rings? Just making sure they can handle the heat in my application.
Answer by: Customer Support on Jul 11, 2025, 9:30 PM
These Buna-N o-rings are rated for service between -40°F and 240°F.

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