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90A Durometer Urethane Back-Up Rings -015 Dash Size, Per Pack

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Description & Features

Engineered for optimal performance in demanding environments, these urethane back-up rings offer robust extrusion resistance. Designed with a 90A durometer, they are molded from high-quality urethane, ensuring durability and reliability. These rings are essential for maintaining seal integrity in hydraulic systems, providing a dependable solution for applications requiring consistent pressure retention.

With a temperature range from -65°F to 220°F, the 90A Durometer Urethane Back-Up Rings -015 Dash Size are versatile for various industrial uses. Each pack includes ten rings, sized to correspond with standard O-Ring dimensions, facilitating easy replacement and installation. As part of the Hercules Sealing Products line, this product guarantees a precise fit and excellent performance, essential for maintaining system efficiency.

SKU: 575-015

Supplier Part Number (MPN): 575-015

Alternate Part Numbers: C1BT77, MI-01810710, MINO-00407Q30482

Specifications

Brand
HERCULES® SEALING PRODUCTS
Dash Size
15
Durometer
95A
Inside Diameter
0.56 in
Material
Urethane
Series
575 Series
Suitable For Use With
Hydraulic and Pneumatic Cylinders
System of Measurement
Imperial

Product Questions & Answers (2)

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Question by: Pete H on Apr 12, 2025, 6:40 PM
these back-up rings stretch for install and then snap back to size -- does that mean I don't need any special tools to get 'em seated right?
Answer by: Customer Support on Apr 14, 2025, 10:37 AM
For urethane back-up rings like these, stretching them over the O-ring groove is pretty much a hand operation. The 90A durometer urethane is firm enough to hold its shape once seated but flexible enough that you can work it into place without needing special tooling. Once stretched and released, it returns to its original size quickly, which helps it sit correctly in the groove without a lot of fussing around.
Question by: Wayne B on Dec 10, 2025, 8:42 PM
What's the temp range these urethane back-up rings can handle?
Answer by: Customer Support on Dec 12, 2025, 11:12 AM
These urethane back-up rings can operate in temperatures from -65°F to 220°F.

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