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

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Description & Features

Manufactured from polyurethane by Hercules Sealing Products, this Polyurethane U-Seal is designed for hydraulic applications requiring reliable sealing performance across a wide range of pressures and temperatures. The beveled lip design promotes superior film breaking, and the material construction supports a working pressure range of 0 to 6,000 PSI with a temperature tolerance from -65°F to 220°F.

Dimensionally, this seal measures 3.25 inches OD, 2.50 inches ID, and 0.50 inches in height, with a 0.375-inch cross section, a configuration where height exceeds cross section, suiting it for applications that call for this specific profile geometry. Urethane construction provides durability and flexibility well suited to demanding hydraulic cylinder and rod sealing applications.

SKU: U37-2.50-50B

Supplier Part Number (MPN): U37-2.50-50B

Alternate Part Numbers: C1DQ51, MI-01197941, MINO-00407X60332

Specifications

Cross Section
0.375 in
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
H
0.5 in
I.D.
2.5 in
O.D.
3.25 in
Supplier Part Number
U37-2.50-50B
Alternate Part Numbers
Alternate Part Number C1DQ51, Alternate Part Number MI-01197941, Alternate Part Number MINO-00407X60332
Product Weight
0.07 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 (3)

Question by: Larry J on May 6, 2025, 8:59 AM
Got a cylinder with a 2.50 bore and 3.25 OD groove, need a half inch tall seal. this the right fit?
Answer by: Customer Support on May 7, 2025, 3:44 PM
Those dimensions match up exactly. The seal measures 2.50 inches ID, 3.25 inches OD, and 0.50 inches in height, so a groove cut to those specs will seat this properly. The cross section runs 0.375 inches, and the height is greater than the cross section, which is worth confirming against your groove geometry before install.
Question by: Steve M on Jul 25, 2025, 1:42 PM
trying to match up a u-seal i pulled out, are these dimensions 3.25 od, 2.50 id, and 0.50 tall?
Answer by: Customer Support on Jul 27, 2025, 12:17 PM
Fit comes down to those three measurements, and this seal is sized 3.25 inch OD, 2.50 inch ID, and 0.50 inch height with a 0.375 inch cross section. It is the profile where the height is greater than the cross section.
Question by: Kent C on Feb 16, 2026, 1:44 PM
What kind of pressure can this thing handle?
Answer by: Customer Support on Feb 17, 2026, 9:11 PM
This U-seal is rated to handle hydraulic applications with pressures ranging from 0 to 6,000 PSI.