90A Durometer Urethane Back-Up Rings -012 Dash Size, Per Pack

Description & Features

Molded from 90A durometer urethane, these back-up rings are designed to resist extrusion in dynamic and static sealing applications where O-rings require additional support. The urethane construction allows the rings to be stretched for installation, then return quickly to their original profile, simplifying the installation process without the need for special tools. Sizes correspond directly to standard O-ring dash sizes, with this pack supplied in -012 dash size.

The 90A Durometer Urethane Back-Up Rings -012 Dash Size, Per Pack is a Hercules Sealing Products offering rated for a temperature range of -65°F to 220°F, making it well suited for hydraulic and industrial sealing assemblies operating across a broad range of service conditions. Each package contains 10 rings.

SKU: 575-012

Supplier Part Number (MPN): 575-012

Alternate Part Numbers: C1BT74, MI-01810596, MINO-00407Q30369

Specifications

Brand
HERCULES® SEALING PRODUCTS
Dash Size
12
Durometer
95A
Inside Diameter
0.38 in
Material
Urethane
Series
575 Series
Suitable For Use With
Hydraulic and Pneumatic Cylinders
System of Measurement
Imperial

Product Questions & Answers (1)

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Question by: Neal H on Jul 29, 2025, 11:45 AM
What's the deal with these back-up rings... do they actually stretch without breaking?
Answer by: Customer Support on Jul 31, 2025, 7:11 AM
Molded from 90A durometer urethane, these back-up rings are designed to stretch during installation and then return to their original size. This makes the installation process easier while maintaining their integrity.

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