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Polyurethane U-Seal, 4.00 Inch OD, 3.25 Inch ID, 0.50 Inch Height
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Supplier Part Number
U37-3.25-50B
Alternate Part Numbers
Alternate Part Number
C1DQ58 ,
Alternate Part Number
MI-01197984 ,
Alternate Part Number
MINO-00407X60337
What kinda pressure can this handle before it gives out?
Question by: Duane H on Oct 22, 2025, 11:08 AM
This U-seal is rated to handle pressures up to 6,000 PSI, so it should hold up in demanding hydraulic applications.
Answer by: Customer Support on Oct 24, 2025, 6:50 AM
Got a 4-inch bore cylinder that needs a new piston seal, will this one fit right, and what's the cross section on it?
Question by: Daryl P on Jan 12, 2026, 11:12 AM
For a standard 4-inch bore hydraulic cylinder, the dimensions here line up well. The OD is 4.00 inches, ID is 3.25 inches, and the cross section runs 0.375 inches. The height comes in at 0.50 inches, which puts it in the deep-type profile category since the height is greater than the cross section. As long as your groove is cut to accept those dimensions, it should drop right in as a piston seal.
Answer by: Customer Support on Jan 14, 2026, 6:56 AM
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