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Polyurethane U-Seal, 5.00 Inch OD, 4.38 Inch ID, 0.31 Inch Height
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Supplier Part Number
U31-4.37
Alternate Part Numbers
Alternate Part Number
C1ER52
What kinda temps can this seal handle before it gives out?
Question by: Lyle B on Dec 29, 2025, 3:30 PM
This polyurethane U-seal will work in applications from -65°F all the way up to 220°F.
Answer by: Customer Support on Dec 31, 2025, 7:08 AM
got a cylinder that takes a 5 inch OD u-cup, is this one sized 5.00 OD x 4.38 ID and about 0.31 tall?
Question by: Eddie A on Feb 28, 2026, 7:53 PM
The dimensions on this U-seal are 5.00 inch OD, 4.375 inch ID, and 0.3125 inch height (cross section is also 0.3125 inch). If your groove and hardware are set up for those sizes, it matches what you described.
Answer by: Customer Support on Mar 2, 2026, 7:38 AM
Got a cylinder rod that measures 4.375 inches across, will this u-seal drop right in, or is there some fitment I need to account for?
Question by: Kirk W on Jan 5, 2026, 8:43 AM
For a rod measuring 4.375 inches, the ID on this seal matches up at 4.375 inches, so you're working with the right fit on that side. The OD runs 5.00 inches, so your housing bore needs to match that. Height comes in at 0.3125 inches, so just confirm your groove depth lines up before you go ahead and seat it.
Answer by: Customer Support on Jan 7, 2026, 6:33 AM
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