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70 Durometer Buna-N O-Ring, Inch OD, 1-1/2 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 hydraulic fluids, oils, and fuels, making it well suited for hydraulic cylinders, pumps, valves, and fluid connectors in industrial equipment.

The 70 Durometer Buna-N O-Ring carries a dash size of -325, with actual dimensions of 1.475 in. ID, 1.895 in. OD, and 0.210 in. width, corresponding to a nominal 1-1/2 in. ID and 1-7/8 in. OD. Sourced from Hercules Sealing Products under catalog number C1CF66, it is a standard AN/MS dash-size o-ring compatible with widely used groove standards.

SKU: A-325

Supplier Part Number (MPN): 568-325

Alternate Part Numbers: C1CF66, MI-08740494, MINO-00407X90494

Specifications

Brand
HERCULES® SEALING PRODUCTS
Color
Black
Cross Section Shape
Round
Dash Size
325
Durometer
70A
Inside Diameter
1-1/2 in
Material
Buna-N
Series
568 Series
Suitable For Use With
Hydraulic Cylinders
System of Measurement
Imperial

Product Questions & Answers (1)

Question by: Brent W on Sep 7, 2025, 2:15 PM
these come in a pack of 20, right? just wanna make sure before i order, got a batch of cylinders to go through and don't want to run short
Answer by: Customer Support on Sep 9, 2025, 9:04 AM
the package quantity is 20 per order. If you've got multiple cylinders to work through, that should give you a solid supply to pull from without having to reorder mid-job.

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