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Polyurethane U-Seal, 3.50 Inch OD, 3.13 Inch ID, 0.19 Inch Height
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Supplier Part Number
U18-3.12-SQB
Alternate Part Numbers
Alternate Part Number
C1DN82 ,
Alternate Part Number
MI-01198699 ,
Alternate Part Number
MINO-00407X60428
what's the pressure rating on this seal? got a cylinder running pretty hard and need to know it'll hold up
Question by: Rhonda A on May 13, 2025, 2:20 PM
Urethane construction on this one handles anywhere from 0 up to 6,000 PSI, so it covers most heavy-duty hydraulic cylinder work without issue. The beveled lip geometry also helps it maintain a consistent seal under load rather than just relying on static compression.
Answer by: Customer Support on May 15, 2025, 6:13 AM
got a cylinder that takes a 3.125 bore seal, is this u-seal the one with 3.50 OD and about 3/16 thick?
Question by: Diane D on Jan 25, 2026, 4:24 PM
The key dimensions on this one are 3.500 inch OD, 3.125 inch ID, and a 0.1875 inch cross section with the same 0.1875 inch height, which matches the SQB profile. If those numbers line up with what you pulled out, it is the right size family.
Answer by: Customer Support on Jan 27, 2026, 3:25 PM
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