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70 Durometer Buna-N O-Ring, Inch OD, 1 Inch ID, 0.07 Inch Width

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Description & Features

Made from 70 durometer Buna-N (Nitrile) rubber, this o-ring offers reliable sealing performance across a temperature range of -40°F to 240°F, making it well-suited for hydraulic systems, pneumatic equipment, and fluid power applications where oil and fuel resistance are required. Buna-N compound provides good resistance to petroleum-based fluids, making it one of the most widely used elastomers in industrial sealing.

The 70 Durometer Buna-N O-Ring carries a dash size of -022, with an actual ID of 0.989 in, an actual OD of 1.129 in, and an actual width of 0.070 in. Supplied by Hercules Sealing Products under catalog number C1CD26, this o-ring is available in packages of 50.

SKU: A-022

Supplier Part Number (MPN): 568-022

Alternate Part Numbers: C1CD26, MI-08740316, MINO-00407X90316

Specifications

Brand
HERCULES® SEALING PRODUCTS
Color
Black
Cross Section Shape
Round
Dash Size
22
Durometer
70A
Inside Diameter
1 in
Material
Buna-N
Series
568 Series
Suitable For Use With
Hydraulic Cylinders
System of Measurement
Imperial

Product Questions & Answers (4)

Question by: Danny M on Jul 12, 2025, 11:37 AM
Reckon this'd hold up okay in a hydraulic system that gets pretty warm?
Answer by: Customer Support on Jul 14, 2025, 9:51 AM
Intended for use in systems ranging from -40°F to 240°F, this 70 Durometer Buna-N O-ring should maintain its sealing properties within that temperature window.
Question by: Janet C on Dec 31, 2025, 10:25 AM
does this o-ring run okay in hydraulic fluid or is it strictly for air lines and dry stuff
Answer by: Customer Support on Jan 2, 2026, 7:59 AM
Buna-N is one of the most common materials you'll find in hydraulic systems, and 70 durometer puts it right in the general-purpose sweet spot. It holds up well against petroleum-based hydraulic oils, which is exactly what most folks are running. The temperature range goes from -40°F up to 240°F, so it covers the majority of standard hydraulic operating conditions without any issue.
Question by: Wes B on Dec 5, 2025, 1:01 PM
What's the deal with the temperature range on these? I'm using them in a spot that can get pretty hot.
Answer by: Customer Support on Dec 7, 2025, 10:16 AM
These Buna-N O-rings are good for use in temperatures ranging from -40°F up to 240°F. Keep in mind that exceeding this range can cause the O-ring to degrade.
Question by: Frank P on Sep 1, 2025, 8:34 AM
trying to match up an old -022 o-ring, is this the right dash size and what are the actual measurements?
Answer by: Customer Support on Sep 3, 2025, 6:03 AM
For a dash size -022, this one matches that callout and is listed with an actual ID of 0.989 inch, an actual OD of 1.129 inch, and an actual width of 0.07 inch. The nominal size is 1 inch ID, 1-1/8 inch OD, with a nominal width of 1/16 inch.

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