The store will not work correctly when cookies are disabled.
JavaScript seems to be disabled in your browser.
For the best experience on our site, be sure to turn on Javascript in your browser.
Polyurethane U-Seal, 2.63 Inch OD, 2.25 Inch ID, 0.38 Inch Height
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Supplier Part Number
U18-2.25-37B
Alternate Part Numbers
Alternate Part Number
C1DN67 ,
Alternate Part Number
MI-01198614 ,
Alternate Part Number
MINO-00407X60419
What kinda pressure can this seal handle, ya know, before it gives out?
Question by: Shawn J on Apr 20, 2025, 8:07 PM
This U-seal is rated to handle pressures from 0 up to 6,000 PSI, so it's good for high-pressure stuff.
Answer by: Customer Support on Apr 22, 2025, 12:13 PM
Got a cylinder bore of 2.25 inches, this U-seal gonna fit right in there without any modification?
Question by: Dustin P on Dec 9, 2025, 10:46 AM
For a 2.25-inch bore, the inner diameter on this seal matches up exactly. The OD comes in at 2.625 inches and the height is 0.375 inches, so as long as your gland dimensions line up with those numbers, you're good to go without any rework. Urethane seals like this one do have some flexibility, but you still want your groove cut to spec for a proper fit.
Answer by: Customer Support on Dec 11, 2025, 6:12 AM
got a cylinder gland that takes a 2.25 ID u-cup, is this the one with the 2.625 OD and 0.375 tall?
Question by: Joyce W on Jul 3, 2025, 3:59 PM
Match it up to the three key dimensions: 2.25 inch ID, 2.625 inch OD, and 0.375 inch height. The cross section is 0.1875 inch, and this style is the Type B where the height is greater than the cross section.
Answer by: Customer Support on Jul 5, 2025, 6:52 AM
Similar Products
Model Number
Cross Section
I.D.
O.D.
H
Price
Buy Now
U12-0.62-25B
0.125 in
0.625 in
0.875 in
0.25 in
U12-1.00-25B
0.125 in
1 in
1.25 in
0.25 in
U12-1.25-SQB
0.125 in
1.25 in
1.5 in
0.125 in
U18-1.25-SQB
0.1875 in
1.25 in
1.625 in
0.1875 in
U18-1.75-37B
0.1875 in
1.75 in
2.125 in
0.375 in
U18-2.12-SQB
0.1875 in
2.125 in
2.5 in
0.1875 in
U18-2.50-31B
0.1875 in
2.5 in
2.875 in
0.3125 in
U25-1.25-37B
0.25 in
1.25 in
1.75 in
0.375 in
U25-1.50-37B
0.25 in
1.5 in
2 in
0.375 in
U25-2.00-37B
0.25 in
2 in
2.5 in
0.375 in
U25-2.50-37B
0.25 in
2.5 in
3 in
0.375 in
U25-3.00
0.25 in
3 in
3.5 in
0.25 in
U25-3.00-37B
0.25 in
3 in
3.5 in
0.375 in
U25-3.50-37B
0.25 in
3.5 in
4 in
0.375 in
U25-4.00-SQB
0.25 in
4 in
4.5 in
0.25 in
U25-4.50
0.25 in
4.5 in
5 in
0.25 in
U25-5.00
0.25 in
5 in
5.5 in
0.25 in
U12-0.18-25B
0.125 in
0.1875 in
0.438 in
0.25 in
U12-0.25-25B
0.125 in
0.25 in
0.5 in
0.25 in
U12-0.25-SQB
0.125 in
0.25 in
0.5 in
0.125 in
U12-0.31-25B
0.125 in
0.3125 in
0.563 in
0.25 in
U12-0.31-SQB
0.125 in
0.3125 in
0.563 in
0.125 in
U12-0.37
0.125 in
0.375 in
0.625 in
0.125 in
U12-0.50-25B
0.125 in
0.5 in
0.75 in
0.25 in
U12-0.50-SQB
0.125 in
0.5 in
0.75 in
0.125 in
U12-0.56
0.125 in
0.625 in
0.938 in
0.125 in
U12-0.62-SQB
0.125 in
0.625 in
0.875 in
0.125 in
U12-0.68
0.125 in
0.6875 in
0.938 in
0.125 in
U12-0.75-18B
0.125 in
0.75 in
1 in
0.1875 in
U12-0.75-25B
0.125 in
0.75 in
1 in
0.25 in
U12-0.75-SQB
0.125 in
0.75 in
1 in
0.125 in
U12-0.81
0.125 in
0.8125 in
1.063 in
0.125 in
U12-0.87-25B
0.125 in
0.875 in
1.125 in
0.25 in
U12-0.87-SQB
0.125 in
0.875 in
1.125 in
0.125 in
U12-1.00-18B
0.125 in
1 in
1.25 in
0.1875 in
U12-1.00-SQB
0.125 in
1 in
1.25 in
0.125 in
U12-1.06-SQB
0.125 in
1.0625 in
1.313 in
0.125 in
U12-1.12-25B
0.125 in
1.0625 in
1.375 in
0.25 in
U12-1.12-SQB
0.125 in
1.0625 in
1.375 in
0.125 in
U12-1.18
0.125 in
0.188 in
1.438 in
0.125 in
U12-1.18-18B
0.125 in
0.188 in
1.438 in
0.1875 in
U12-1.18-25B
0.125 in
0.188 in
1.438 in
0.25 in
U12-1.25-18B
0.125 in
1.25 in
1.5 in
0.1875 in
U12-1.25-25B
0.125 in
1.25 in
1.5 in
0.25 in
U12-1.37-25B
0.125 in
1.375 in
1.625 in
0.25 in
U12-1.37-SQB
0.125 in
1.375 in
1.625 in
0.125 in
U12-1.50-25B
0.125 in
1.5 in
1.75 in
0.25 in
U12-1.50-SQB
0.125 in
1.5 in
1.75 in
0.125 in
U12-1.62-SQB
0.125 in
1.625 in
1.875 in
0.125 in
U12-1.75-SQB
0.125 in
1.75 in
2 in
0.125 in
U12-2.00
0.125 in
2 in
2.25 in
0.125 in
U12-2.25
0.125 in
2.25 in
2.5 in
0.125 in
U12-2.75
0.125 in
2.75 in
3 in
0.125 in
U15-1.18
0.1563 in
0.188 in
1.5 in
0.1563 in
U15-1.25
0.1563 in
1.25 in
1.563 in
0.1563 in
U15-1.37
0.1563 in
1.375 in
1.688 in
0.1563 in
U18-0.50
0.1875 in
0.5 in
0.875 in
0.1875 in
U18-0.62-31B
0.1875 in
0.625 in
1 in
0.3125 in
U18-0.62-SQB
0.1875 in
0.625 in
1 in
0.1875 in
U18-0.75-31B
0.1875 in
0.75 in
1.125 in
0.3125 in
U18-0.75-SQB
0.1875 in
0.75 in
1.125 in
0.1875 in
U18-0.87-31B
0.1875 in
0.875 in
1.25 in
0.3125 in
U18-0.87-SQB
0.1875 in
0.875 in
1.25 in
0.1875 in
U18-1.00-25B
0.1875 in
1 in
1.375 in
0.25 in
U18-1.00-31B
0.1875 in
1 in
1.375 in
0.3125 in
U18-1.00-37B
0.1875 in
1 in
1.375 in
0.375 in
U18-1.00-SQB
0.1875 in
1 in
1.375 in
0.1875 in
U18-1.12-25B
0.1875 in
1.0625 in
1.5 in
0.25 in
U18-1.12-31B
0.1875 in
1.0625 in
1.5 in
0.3125 in
U18-1.12-SQB
0.1875 in
1.0625 in
1.5 in
0.1875 in
U18-1.18
0.1875 in
0.188 in
1.563 in
0.1875 in
U18-1.25-25B
0.1875 in
1.25 in
1.625 in
0.25 in
U18-1.25-31B
0.1875 in
1.25 in
1.625 in
0.3125 in
U18-1.25-37B
0.1875 in
1.25 in
1.625 in
0.375 in
U18-1.37-25B
0.1875 in
1.375 in
1.75 in
0.25 in
U18-1.37-31B
0.1875 in
1.375 in
1.75 in
0.3125 in
U18-1.37-37B
0.1875 in
1.375 in
1.75 in
0.375 in
U18-1.37-SQB
0.1875 in
1.375 in
1.75 in
0.1875 in
U18-1.50-25B
0.1875 in
1.5 in
1.875 in
0.25 in
U18-1.50-31B
0.1875 in
1.5 in
1.875 in
0.3125 in
U18-1.50-37B
0.1875 in
1.5 in
1.875 in
0.375 in
U18-1.50-SQB
0.1875 in
1.5 in
1.875 in
0.1875 in
U18-1.62
0.1875 in
1.625 in
2 in
0.1875 in
U18-1.62-25B
0.1875 in
1.625 in
2 in
0.25 in
U18-1.62-31B
0.1875 in
1.625 in
2 in
0.3125 in
U18-1.62-37B
0.1875 in
1.625 in
2 in
0.375 in
U18-1.62-SQB
0.1875 in
1.625 in
2 in
0.1875 in
U18-1.75-25B
0.1875 in
1.75 in
2.125 in
0.25 in
U18-1.75-31B
0.1875 in
1.75 in
2.125 in
0.3125 in
U18-1.75-SQB
0.1875 in
1.75 in
2.125 in
0.1875 in
U18-1.87-37B
0.1875 in
1.875 in
2.25 in
0.375 in
U18-1.87-SQB
0.1875 in
1.875 in
2.25 in
0.1875 in
U18-2.00-31B
0.1875 in
2 in
2.375 in
0.3125 in
U18-2.00-37B
0.1875 in
2 in
2.375 in
0.375 in
U18-2.00-SQB
0.1875 in
2 in
2.375 in
0.1875 in
U18-2.12-25B
0.1875 in
2.125 in
2.5 in
0.25 in
U18-2.25-37B
0.1875 in
2.25 in
2.625 in
0.375 in
U18-2.25-SQB
0.1875 in
2.25 in
2.625 in
0.1875 in
U18-2.37-SQB
0.1875 in
2.375 in
2.75 in
0.1875 in
U18-2.50-25B
0.1875 in
2.5 in
2.875 in
0.25 in
U18-2.50-37B
0.1875 in
2.5 in
2.875 in
0.375 in
U18-2.50-SQB
0.1875 in
2.5 in
2.875 in
0.1875 in
U18-2.62-37B
0.1875 in
2.625 in
3 in
0.375 in
U18-2.62-SQB
0.1875 in
2.625 in
3 in
0.1875 in
U18-2.75-37B
0.1875 in
2.75 in
3.125 in
0.375 in
U18-2.75-SQB
0.1875 in
2.75 in
3.125 in
0.1875 in
U18-2.87
0.1875 in
2.875 in
3.25 in
0.1875 in
U18-3.00
0.1875 in
3 in
3.375 in
0.1875 in
U18-3.00-37B
0.1875 in
3 in
3.375 in
0.375 in
U18-3.12-37B
0.1875 in
3.125 in
3.5 in
0.375 in
U18-3.12-SQB
0.1875 in
3.125 in
3.5 in
0.1875 in
U18-3.50-37B
0.1875 in
3.5 in
3.875 in
0.375 in
U18-3.62-37B
0.1875 in
3.625 in
4 in
0.375 in
U18-3.62-SQB
0.1875 in
3.625 in
4 in
0.1875 in
U18-4.00-37B
0.1875 in
4 in
4.375 in
0.375 in
U25-0.75
0.25 in
0.75 in
1.25 in
0.25 in
U25-0.93
0.25 in
0.8125 in
1.438 in
0.25 in
U25-1.00-37B
0.25 in
1 in
1.5 in
0.375 in
U25-1.00-SQB
0.25 in
1 in
1.5 in
0.25 in
U25-1.12
0.25 in
1.0625 in
1.625 in
0.25 in
U25-1.12-37B
0.25 in
1.0625 in
1.625 in
0.375 in
U25-1.18
0.25 in
0.188 in
1.688 in
0.25 in
U25-1.25-SQB
0.25 in
1.25 in
1.75 in
0.25 in
U25-1.37
0.25 in
1.375 in
1.875 in
0.25 in
U25-1.37-37B
0.25 in
1.375 in
1.875 in
0.375 in
U25-1.50-31B
0.25 in
1.5 in
2 in
0.3125 in
U25-1.50-SQB
0.25 in
1.5 in
2 in
0.25 in
U25-1.75
0.25 in
1.75 in
2.25 in
0.25 in
U25-1.75-37B
0.25 in
1.75 in
2.25 in
0.375 in
U25-1.87-37B
0.25 in
1.875 in
2.375 in
0.375 in
U25-2.00-31B
0.25 in
2 in
2.5 in
0.3125 in
U25-2.00-SQB
0.25 in
2 in
2.5 in
0.25 in
U25-2.12-37B
0.25 in
2.125 in
2.625 in
0.375 in
U25-2.25
0.25 in
2.25 in
2.75 in
0.25 in
U25-2.25-37B
0.25 in
2.25 in
2.75 in
0.375 in
U25-2.37-37B
0.25 in
2.375 in
2.875 in
0.375 in
U25-2.50-SQB
0.25 in
2.5 in
3 in
0.25 in
U25-2.62-37B
0.25 in
2.625 in
3.125 in
0.375 in
U25-2.75-37B
0.25 in
2.75 in
3.25 in
0.375 in
U25-2.75-SQB
0.25 in
2.75 in
3.25 in
0.25 in
U25-3.25-37B
0.25 in
3.25 in
3.75 in
0.375 in
U25-3.50
0.25 in
3.5 in
4 in
0.25 in
U25-3.50-SQB
0.25 in
3.5 in
4 in
0.25 in
U25-3.75-37B
0.25 in
3.75 in
4.25 in
0.375 in
U25-3.75-SQB
0.25 in
3.75 in
4.25 in
0.25 in
U25-4.00-37B
0.25 in
4 in
4.5 in
0.375 in
U25-4.00-50D
0.25 in
4 in
4.5 in
0.5 in
U25-4.00-56B
0.25 in
4 in
4.5 in
0.5625 in
U25-4.50-37B
0.25 in
4.5 in
5 in
0.375 in
U25-4.50-56B
0.25 in
4.5 in
5 in
0.5625 in
U25-4.50-62B
0.25 in
4.5 in
5 in
0.625 in
U25-5.00-37B
0.25 in
5 in
5.5 in
0.375 in
U25-5.50
0.25 in
5.5 in
6 in
0.25 in
U25-5.50-37B
0.25 in
5.5 in
6 in
0.375 in
U25-5.50-56B
0.25 in
5.5 in
6 in
0.5625 in
U31-1.00-50B
0.3125 in
1 in
1.625 in
0.5 in
U31-1.25
0.3125 in
1.25 in
1.875 in
0.3125 in
U31-1.25-37B
0.3125 in
1.25 in
1.875 in
0.375 in
U31-1.37-37B
0.3125 in
1.375 in
2 in
0.375 in
U31-1.37-SQB
0.3125 in
1.375 in
2 in
0.3125 in
U31-1.50
0.3125 in
1.5 in
2.125 in
0.3125 in
U31-1.75-37B
0.3125 in
1.75 in
2.375 in
0.375 in
U31-1.87
0.3125 in
1.875 in
2.5 in
0.3125 in
U31-2.00
0.3125 in
2 in
2.625 in
0.3125 in
U31-2.00-50B
0.3125 in
2 in
2.625 in
0.5 in
U31-2.25-50B
0.3125 in
2.25 in
2.875 in
0.5 in
U31-2.37
0.3125 in
2.375 in
3 in
0.3125 in
U31-2.50
0.3125 in
2.5 in
3.125 in
0.3125 in
U31-2.50-50B
0.3125 in
2.5 in
3.125 in
0.5 in
U31-2.75
0.3125 in
2.75 in
3.375 in
0.3125 in
U31-2.75-50B
0.3125 in
2.75 in
3.375 in
0.5 in
U31-2.87
0.3125 in
2.875 in
3.5 in
0.3125 in
U31-3.00-50B
0.3125 in
3 in
3.625 in
0.5 in
U31-3.37-50B
0.3125 in
3.375 in
4 in
0.5 in
U31-4.00
0.3125 in
4 in
4.625 in
0.3125 in
U31-4.00-56B
0.3125 in
4 in
4.625 in
0.5625 in
U31-4.37
0.3125 in
4.375 in
5 in
0.3125 in
U31-4.50
0.3125 in
4.5 in
5.125 in
0.3125 in
U37-1.25
0.375 in
1.25 in
2 in
0.375 in
U37-1.75
0.375 in
1.75 in
2.5 in
0.375 in
U37-2.50-50B
0.375 in
2.5 in
3.25 in
0.5 in
U37-2.75
0.375 in
2.75 in
3.5 in
0.375 in
U37-3.25-50B
0.375 in
3.25 in
4 in
0.5 in
U37-3.50
0.375 in
3.5 in
4.25 in
0.375 in
U37-3.75-50D
0.375 in
3.75 in
4.5 in
0.5 in
U37-4.00-62B
0.375 in
4 in
4.75 in
0.625 in
U37-4.25-50D
0.375 in
4.25 in
5 in
0.5 in
U37-4.25-62B
0.375 in
4.25 in
5 in
0.625 in
U37-4.25-SQB
0.375 in
4.25 in
5 in
0.375 in
U37-4.50-62B
0.375 in
4.5 in
5.25 in
0.625 in
U37-5.00-62B
0.375 in
5 in
5.75 in
0.625 in
U37-5.25
0.375 in
5.25 in
6 in
0.375 in
U37-5.25-50D
0.375 in
5.25 in
6 in
0.5 in
U37-6.25-50D
0.375 in
6.25 in
7 in
0.5 in
U50-2.00-SQB
0.5 in
2 in
3 in
0.5 in
U50-2.50
0.5 in
2.5 in
3.5 in
0.5 in
