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Polyurethane U-Seal, 6.00 Inch OD, 5.50 Inch ID, 0.38 Inch Height

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Description & Features

Engineered for high-pressure hydraulic applications, this polyurethane U-Seal from Hercules Sealing Products offers exceptional durability and reliability. With an outer diameter of 6.00 inches and an inner diameter of 5.50 inches, it is suited for systems operating at pressures up to 6,000 PSI. The seal's beveled lip design ensures superior film breaking, enhancing system efficiency and performance.

The U-Seal's construction from urethane material provides excellent resistance to wear and thermal stability, making it ideal for challenging environments. It maintains performance across a broad temperature range from -65°F to 220°F. The seal features a height of 0.375 inches with a cross-section of 0.25 inches, designed to ensure a secure fit and optimal sealing capability.

SKU: U25-5.50-37B

Supplier Part Number (MPN): U25-5.50-37B

Alternate Part Numbers: C1DP74, MI-01198362, MINO-00407X60386

Specifications

Cross Section
0.25 in
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
H
0.375 in
I.D.
5.5 in
O.D.
6 in
Supplier Part Number
U25-5.50-37B
Alternate Part Numbers
Alternate Part Number C1DP74, Alternate Part Number MI-01198362, Alternate Part Number MINO-00407X60386
Product Weight
0.08 lbs

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0.1875 in

Polyurethane U-Seal, 3.38 Inch OD, 3.00 Inch ID, 0.19 Inch Height

U18-3.00 Polyurethane U-Seal

0.1875 in

3 in

3.375 in

0.1875 in

Polyurethane U-Seal, 3.38 Inch OD, 3.00 Inch ID, 0.38 Inch Height

U18-3.00-37B Polyurethane U-Seal

0.1875 in

3 in

3.375 in

0.375 in

Polyurethane U-Seal, 3.50 Inch OD, 3.13 Inch ID, 0.38 Inch Height

U18-3.12-37B Polyurethane U-Seal

0.1875 in

3.125 in

3.5 in

0.375 in

Polyurethane U-Seal, 3.50 Inch OD, 3.13 Inch ID, 0.19 Inch Height

U18-3.12-SQB Polyurethane U-Seal

0.1875 in

3.125 in

3.5 in

0.1875 in

Polyurethane U-Seal, 3.88 Inch OD, 3.50 Inch ID, 0.38 Inch Height

U18-3.50-37B Polyurethane U-Seal

0.1875 in

3.5 in

3.875 in

0.375 in

Polyurethane U-Seal, 4.00 Inch OD, 3.63 Inch ID, 0.38 Inch Height

U18-3.62-37B Polyurethane U-Seal

0.1875 in

3.625 in

4 in

0.375 in

Polyurethane U-Seal, 4.00 Inch OD, 3.63 Inch ID, 0.19 Inch Height

U18-3.62-SQB Polyurethane U-Seal

0.1875 in

3.625 in

4 in

0.1875 in

Polyurethane U-Seal, 4.38 Inch OD, 4.00 Inch ID, 0.38 Inch Height

U18-4.00-37B Polyurethane U-Seal

0.1875 in

4 in

4.375 in

0.375 in

Polyurethane U-Seal, 1.25 Inch OD, 0.75 Inch ID, 0.25 Inch Height

U25-0.75 Polyurethane U-Seal

0.25 in

0.75 in

1.25 in

0.25 in

Polyurethane U-Seal, 1.44 Inch OD, 0.81 Inch ID, 0.25 Inch Height

U25-0.93 Polyurethane U-Seal

0.25 in

0.8125 in

1.438 in

0.25 in

Polyurethane U-Seal, 1.50 Inch OD, 1.00 Inch ID, 0.38 Inch Height

U25-1.00-37B Polyurethane U-Seal

0.25 in

1 in

1.5 in

0.375 in

Polyurethane U-Seal, 1.50 Inch OD, 1.00 Inch ID, 0.25 Inch Height

U25-1.00-SQB Polyurethane U-Seal

0.25 in

1 in

1.5 in

0.25 in

Polyurethane U-Seal, 1.63 Inch OD, 1.06 Inch ID, 0.25 Inch Height

U25-1.12 Polyurethane U-Seal

0.25 in

1.0625 in

1.625 in

0.25 in

Polyurethane U-Seal, 1.63 Inch OD, 1.06 Inch ID, 0.38 Inch Height

U25-1.12-37B Polyurethane U-Seal

0.25 in

1.0625 in

1.625 in

0.375 in

Polyurethane U-Seal, 1.69 Inch OD, 0.19 Inch ID, 0.25 Inch Height

U25-1.18 Polyurethane U-Seal

0.25 in

0.188 in

1.688 in

0.25 in

Polyurethane U-Seal, 1.75 Inch OD, 1.25 Inch ID, 0.25 Inch Height

U25-1.25-SQB Polyurethane U-Seal

0.25 in

1.25 in

1.75 in

0.25 in

Polyurethane U-Seal, 1.88 Inch OD, 1.38 Inch ID, 0.25 Inch Height

U25-1.37 Polyurethane U-Seal

0.25 in

1.375 in

1.875 in

0.25 in

Polyurethane U-Seal, 1.88 Inch OD, 1.38 Inch ID, 0.38 Inch Height

U25-1.37-37B Polyurethane U-Seal

0.25 in

1.375 in

1.875 in

0.375 in

Polyurethane U-Seal, 2.00 Inch OD, 1.50 Inch ID, 0.31 Inch Height

U25-1.50-31B Polyurethane U-Seal

0.25 in

1.5 in

2 in

0.3125 in

Polyurethane U-Seal, 2.00 Inch OD, 1.50 Inch ID, 0.25 Inch Height

U25-1.50-SQB Polyurethane U-Seal

0.25 in

1.5 in

2 in

0.25 in

Polyurethane U-Seal, 2.25 Inch OD, 1.75 Inch ID, 0.25 Inch Height

U25-1.75 Polyurethane U-Seal

0.25 in

1.75 in

2.25 in

0.25 in

Polyurethane U-Seal, 2.25 Inch OD, 1.75 Inch ID, 0.38 Inch Height

U25-1.75-37B Polyurethane U-Seal

0.25 in

1.75 in

2.25 in

0.375 in

Polyurethane U-Seal, 2.38 Inch OD, 1.88 Inch ID, 0.38 Inch Height

U25-1.87-37B Polyurethane U-Seal

0.25 in

1.875 in

2.375 in

0.375 in

Polyurethane U-Seal, 2.50 Inch OD, 2.00 Inch ID, 0.31 Inch Height

U25-2.00-31B Polyurethane U-Seal

0.25 in

2 in

2.5 in

0.3125 in

Polyurethane U-Seal, 2.50 Inch OD, 2.00 Inch ID, 0.25 Inch Height

U25-2.00-SQB Polyurethane U-Seal

0.25 in

2 in

2.5 in

0.25 in

Polyurethane U-Seal, 2.63 Inch OD, 2.13 Inch ID, 0.38 Inch Height

U25-2.12-37B Polyurethane U-Seal

0.25 in

2.125 in

2.625 in

0.375 in

Polyurethane U-Seal, 2.75 Inch OD, 2.25 Inch ID, 0.25 Inch Height

U25-2.25 Polyurethane U-Seal

0.25 in

2.25 in

2.75 in

0.25 in

Polyurethane U-Seal, 2.75 Inch OD, 2.25 Inch ID, 0.38 Inch Height

U25-2.25-37B Polyurethane U-Seal

0.25 in

2.25 in

2.75 in

0.375 in

Polyurethane U-Seal, 2.88 Inch OD, 2.38 Inch ID, 0.38 Inch Height

U25-2.37-37B Polyurethane U-Seal

0.25 in

2.375 in

2.875 in

0.375 in

Polyurethane U-Seal, 3.00 Inch OD, 2.50 Inch ID, 0.25 Inch Height

U25-2.50-SQB Polyurethane U-Seal

0.25 in

2.5 in

3 in

0.25 in

Polyurethane U-Seal, 3.13 Inch OD, 2.63 Inch ID, 0.38 Inch Height

U25-2.62-37B Polyurethane U-Seal

0.25 in

2.625 in

3.125 in

0.375 in

Polyurethane U-Seal, 3.25 Inch OD, 2.75 Inch ID, 0.38 Inch Height

U25-2.75-37B Polyurethane U-Seal

0.25 in

2.75 in

3.25 in

0.375 in

Polyurethane U-Seal, 3.25 Inch OD, 2.75 Inch ID, 0.25 Inch Height

U25-2.75-SQB Polyurethane U-Seal

0.25 in

2.75 in

3.25 in

0.25 in

Polyurethane U-Seal, 3.75 Inch OD, 3.25 Inch ID, 0.38 Inch Height

U25-3.25-37B Polyurethane U-Seal

0.25 in

3.25 in

3.75 in

0.375 in

Polyurethane U-Seal, 4.00 Inch OD, 3.50 Inch ID, 0.25 Inch Height

U25-3.50 Polyurethane U-Seal

0.25 in

3.5 in

4 in

0.25 in

Polyurethane U-Seal, 4.00 Inch OD, 3.50 Inch ID, 0.25 Inch Height

U25-3.50-SQB Polyurethane U-Seal

0.25 in

3.5 in

4 in

0.25 in

Polyurethane U-Seal, 4.25 Inch OD, 3.75 Inch ID, 0.38 Inch Height

U25-3.75-37B Polyurethane U-Seal

0.25 in

3.75 in

4.25 in

0.375 in

Polyurethane U-Seal, 4.25 Inch OD, 3.75 Inch ID, 0.25 Inch Height

U25-3.75-SQB Polyurethane U-Seal

0.25 in

3.75 in

4.25 in

0.25 in

Polyurethane U-Seal, 4.50 Inch OD, 4.00 Inch ID, 0.38 Inch Height

U25-4.00-37B Polyurethane U-Seal

0.25 in

4 in

4.5 in

0.375 in

Polyurethane U-Seal, 4.50 Inch OD, 4.00 Inch ID, 0.50 Inch Height

U25-4.00-50D Polyurethane U-Seal

0.25 in

4 in

4.5 in

0.5 in

Polyurethane U-Seal, 4.50 Inch OD, 4.00 Inch ID, 0.56 Inch Height

U25-4.00-56B Polyurethane U-Seal

0.25 in

4 in

4.5 in

0.5625 in

Polyurethane U-Seal, 5.00 Inch OD, 4.50 Inch ID, 0.38 Inch Height

U25-4.50-37B Polyurethane U-Seal

0.25 in

4.5 in

5 in

0.375 in

Polyurethane U-Seal, 5.00 Inch OD, 4.50 Inch ID, 0.56 Inch Height

U25-4.50-56B Polyurethane U-Seal

0.25 in

4.5 in

5 in

0.5625 in

Polyurethane U-Seal, 5.00 Inch OD, 4.50 Inch ID, 0.63 Inch Height

U25-4.50-62B Polyurethane U-Seal

0.25 in

4.5 in

5 in

0.625 in

Polyurethane U-Seal, 5.50 Inch OD, 5.00 Inch ID, 0.38 Inch Height

U25-5.00-37B Polyurethane U-Seal

0.25 in

5 in

5.5 in

0.375 in

Polyurethane U-Seal, 6.00 Inch OD, 5.50 Inch ID, 0.25 Inch Height

U25-5.50 Polyurethane U-Seal

0.25 in

5.5 in

6 in

0.25 in

Polyurethane U-Seal, 6.00 Inch OD, 5.50 Inch ID, 0.38 Inch Height

U25-5.50-37B Polyurethane U-Seal

0.25 in

5.5 in

6 in

0.375 in

Polyurethane U-Seal, 6.00 Inch OD, 5.50 Inch ID, 0.56 Inch Height

U25-5.50-56B Polyurethane U-Seal

0.25 in

5.5 in

6 in

0.5625 in

Polyurethane U-Seal, 1.63 Inch OD, 1.00 Inch ID, 0.50 Inch Height

U31-1.00-50B Polyurethane U-Seal

0.3125 in

1 in

1.625 in

0.5 in

Polyurethane U-Seal, 1.88 Inch OD, 1.25 Inch ID, 0.31 Inch Height

U31-1.25 Polyurethane U-Seal

0.3125 in

1.25 in

1.875 in

0.3125 in

Polyurethane U-Seal, 1.88 Inch OD, 1.25 Inch ID, 0.38 Inch Height

U31-1.25-37B Polyurethane U-Seal

0.3125 in

1.25 in

1.875 in

0.375 in

Polyurethane U-Seal, 2.00 Inch OD, 1.38 Inch ID, 0.38 Inch Height

U31-1.37-37B Polyurethane U-Seal

0.3125 in

1.375 in

2 in

0.375 in

Polyurethane U-Seal, 2.00 Inch OD, 1.38 Inch ID, 0.31 Inch Height

U31-1.37-SQB Polyurethane U-Seal

0.3125 in

1.375 in

2 in

0.3125 in

Polyurethane U-Seal, 2.13 Inch OD, 1.50 Inch ID, 0.31 Inch Height

U31-1.50 Polyurethane U-Seal

0.3125 in

1.5 in

2.125 in

0.3125 in

Polyurethane U-Seal, 2.38 Inch OD, 1.75 Inch ID, 0.38 Inch Height

U31-1.75-37B Polyurethane U-Seal

0.3125 in

1.75 in

2.375 in

0.375 in

Polyurethane U-Seal, 2.50 Inch OD, 1.88 Inch ID, 0.31 Inch Height

U31-1.87 Polyurethane U-Seal

0.3125 in

1.875 in

2.5 in

0.3125 in

Polyurethane U-Seal, 2.63 Inch OD, 2.00 Inch ID, 0.31 Inch Height

U31-2.00 Polyurethane U-Seal

0.3125 in

2 in

2.625 in

0.3125 in

Polyurethane U-Seal, 2.63 Inch OD, 2.00 Inch ID, 0.50 Inch Height

U31-2.00-50B Polyurethane U-Seal

0.3125 in

2 in

2.625 in

0.5 in

Polyurethane U-Seal, 2.88 Inch OD, 2.25 Inch ID, 0.50 Inch Height

U31-2.25-50B Polyurethane U-Seal

0.3125 in

2.25 in

2.875 in

0.5 in

Polyurethane U-Seal, 3.00 Inch OD, 2.38 Inch ID, 0.31 Inch Height

U31-2.37 Polyurethane U-Seal

0.3125 in

2.375 in

3 in

0.3125 in

Polyurethane U-Seal, 3.13 Inch OD, 2.50 Inch ID, 0.31 Inch Height

U31-2.50 Polyurethane U-Seal

0.3125 in

2.5 in

3.125 in

0.3125 in

Polyurethane U-Seal, 3.13 Inch OD, 2.50 Inch ID, 0.50 Inch Height

U31-2.50-50B Polyurethane U-Seal

0.3125 in

2.5 in

3.125 in

0.5 in

Polyurethane U-Seal, 3.38 Inch OD, 2.75 Inch ID, 0.31 Inch Height

U31-2.75 Polyurethane U-Seal

0.3125 in

2.75 in

3.375 in

0.3125 in

Polyurethane U-Seal, 3.38 Inch OD, 2.75 Inch ID, 0.50 Inch Height

U31-2.75-50B Polyurethane U-Seal

0.3125 in

2.75 in

3.375 in

0.5 in

Polyurethane U-Seal, 3.50 Inch OD, 2.88 Inch ID, 0.31 Inch Height

U31-2.87 Polyurethane U-Seal

0.3125 in

2.875 in

3.5 in

0.3125 in

Polyurethane U-Seal, 3.63 Inch OD, 3.00 Inch ID, 0.50 Inch Height

U31-3.00-50B Polyurethane U-Seal

0.3125 in

3 in

3.625 in

0.5 in

Polyurethane U-Seal, 4.00 Inch OD, 3.38 Inch ID, 0.50 Inch Height

U31-3.37-50B Polyurethane U-Seal

0.3125 in

3.375 in

4 in

0.5 in

Polyurethane U-Seal, 4.63 Inch OD, 4.00 Inch ID, 0.31 Inch Height

U31-4.00 Polyurethane U-Seal

0.3125 in

4 in

4.625 in

0.3125 in

Polyurethane U-Seal, 4.63 Inch OD, 4.00 Inch ID, 0.56 Inch Height

U31-4.00-56B Polyurethane U-Seal

0.3125 in

4 in

4.625 in

0.5625 in

Polyurethane U-Seal, 5.00 Inch OD, 4.38 Inch ID, 0.31 Inch Height

U31-4.37 Polyurethane U-Seal

0.3125 in

4.375 in

5 in

0.3125 in

Polyurethane U-Seal, 5.13 Inch OD, 4.50 Inch ID, 0.31 Inch Height

U31-4.50 Polyurethane U-Seal

0.3125 in

4.5 in

5.125 in

0.3125 in

Polyurethane U-Seal, 2.00 Inch OD, 1.25 Inch ID, 0.38 Inch Height

U37-1.25 Polyurethane U-Seal

0.375 in

1.25 in

2 in

0.375 in

Polyurethane U-Seal, 2.50 Inch OD, 1.75 Inch ID, 0.38 Inch Height

U37-1.75 Polyurethane U-Seal

0.375 in

1.75 in

2.5 in

0.375 in

Polyurethane U-Seal, 3.25 Inch OD, 2.50 Inch ID, 0.50 Inch Height

U37-2.50-50B Polyurethane U-Seal

0.375 in

2.5 in

3.25 in

0.5 in

Polyurethane U-Seal, 3.50 Inch OD, 2.75 Inch ID, 0.38 Inch Height

U37-2.75 Polyurethane U-Seal

0.375 in

2.75 in

3.5 in

0.375 in

Polyurethane U-Seal, 4.00 Inch OD, 3.25 Inch ID, 0.50 Inch Height

U37-3.25-50B Polyurethane U-Seal

0.375 in

3.25 in

4 in

0.5 in

Polyurethane U-Seal, 4.25 Inch OD, 3.50 Inch ID, 0.38 Inch Height

U37-3.50 Polyurethane U-Seal

0.375 in

3.5 in

4.25 in

0.375 in

Polyurethane U-Seal, 4.50 Inch OD, 3.75 Inch ID, 0.50 Inch Height

U37-3.75-50D Polyurethane U-Seal

0.375 in

3.75 in

4.5 in

0.5 in

Polyurethane U-Seal, 4.75 Inch OD, 4.00 Inch ID, 0.63 Inch Height

U37-4.00-62B Polyurethane U-Seal

0.375 in

4 in

4.75 in

0.625 in

Polyurethane U-Seal, 5.00 Inch OD, 4.25 Inch ID, 0.50 Inch Height

U37-4.25-50D Polyurethane U-Seal

0.375 in

4.25 in

5 in

0.5 in

Polyurethane U-Seal, 5.00 Inch OD, 4.25 Inch ID, 0.63 Inch Height

U37-4.25-62B Polyurethane U-Seal

0.375 in

4.25 in

5 in

0.625 in

Polyurethane U-Seal, 5.00 Inch OD, 4.25 Inch ID, 0.38 Inch Height

U37-4.25-SQB Polyurethane U-Seal

0.375 in

4.25 in

5 in

0.375 in

Polyurethane U-Seal, 5.25 Inch OD, 4.50 Inch ID, 0.63 Inch Height

U37-4.50-62B Polyurethane U-Seal

0.375 in

4.5 in

5.25 in

0.625 in

Polyurethane U-Seal, 5.75 Inch OD, 5.00 Inch ID, 0.63 Inch Height

U37-5.00-62B Polyurethane U-Seal

0.375 in

5 in

5.75 in

0.625 in

Polyurethane U-Seal, 6.00 Inch OD, 5.25 Inch ID, 0.38 Inch Height

U37-5.25 Polyurethane U-Seal

0.375 in

5.25 in

6 in

0.375 in

Polyurethane U-Seal, 6.00 Inch OD, 5.25 Inch ID, 0.50 Inch Height

U37-5.25-50D Polyurethane U-Seal

0.375 in

5.25 in

6 in

0.5 in

Polyurethane U-Seal, 7.00 Inch OD, 6.25 Inch ID, 0.50 Inch Height

U37-6.25-50D Polyurethane U-Seal

0.375 in

6.25 in

7 in

0.5 in

Polyurethane U-Seal, 3.00 Inch OD, 2.00 Inch ID, 0.50 Inch Height

U50-2.00-SQB Polyurethane U-Seal

0.5 in

2 in

3 in

0.5 in

Polyurethane U-Seal, 3.50 Inch OD, 2.50 Inch ID, 0.50 Inch Height

U50-2.50 Polyurethane U-Seal

0.5 in

2.5 in

3.5 in

0.5 in

Product Questions & Answers (2)

Question by: Jimmy T on Feb 1, 2026, 7:30 AM
got a cylinder that takes a 6.00 OD and 5.50 ID u-cup, is this the right size or am i missing something
Answer by: Customer Support on Feb 3, 2026, 6:06 AM
Fit comes down to the seal’s measured dimensions. This U-seal is 6.00 inch OD, 5.50 inch ID, with a 0.375 inch height and a 0.25 inch cross section, so it matches those numbers directly.
Question by: Keith M on Nov 11, 2025, 1:36 PM
What kind of pressure can this handle, and what's it made of?
Answer by: Customer Support on Nov 13, 2025, 10:16 AM
This U-seal is made from urethane and can handle pressures up to 6,000 PSI.