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ST Style Urethane Wiper Ring, 2.75 Inch Rod Diameter, 3.25 Inch Wiper OD, 1/4 Inch Base Thickness

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Description & Features

Manufactured by Hercules Sealing Products, this ST Style Urethane Wiper Ring is designed for hydraulic cylinder rod sealing applications requiring reliable contamination exclusion. With a 2.75 inch rod diameter, 3.25 inch wiper OD, and 1/4 inch base thickness, it is dimensionally suited for a range of standard hydraulic cylinder configurations.

Constructed from urethane, this wiper ring performs across a temperature range of -65°F to 220°F, making it compatible with a broad set of industrial hydraulic service conditions. The ST style profile provides a stable base fit and effective wiping action to prevent dirt, debris, and moisture from entering the cylinder during rod retraction. A fluorocarbon (V suffix) variant is available for applications requiring an extended temperature range up to 400°F.

SKU: ST-275

Supplier Part Number (MPN): ST-275

Alternate Part Numbers: C1DL41, MI-00967672, MINO-00407X20020

Specifications

Brand
HERCULES® SEALING PRODUCTS
Dimensions
1/4 in THK
Durometer
90
Material
Urethane
Series
ST Series
Wiper OD b Dimensions
3-1/4 in

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Product Questions & Answers (3)

Question by: Tony A on May 21, 2025, 8:11 AM
Got a cylinder with a 2.75 inch rod that needs a new wiper, this the right size to drop in?
Answer by: Customer Support on May 22, 2025, 11:50 AM
For a 2.75 inch rod diameter, yes, the dimensions line up. The wiper OD comes in at 3.25 inches with a 1/4 inch base thickness, so it fits standard hydraulic cylinder configurations built around that rod size. It's a urethane ST style profile, which gives you a solid base fit and keeps dirt, debris, and moisture out during rod retraction.
Question by: Eddie C on Jan 15, 2026, 7:01 AM
trying to match up a wiper on a cylinder rod, are these dimensions for a 2.75 rod with a 3.25 outside and 1/4 base?
Answer by: Customer Support on Jan 17, 2026, 6:39 AM
The key callouts on this ST style wiper ring are a 2.75 inch rod diameter, a 3.25 inch wiper outside diameter, and a 1/4 inch base thickness. If those three numbers match what your cylinder is built for, you are looking at the right size.
Question by: Keith B on Jun 22, 2025, 9:45 PM
What size rod does this wiper ring fit? I wanna make sure it's the right one for my cylinder.
Answer by: Customer Support on Jun 24, 2025, 6:57 AM
This Hercules ST Style wiper ring is made to fit a 2.75-inch diameter rod. The outside diameter of the wiper itself is 3.25 inches, and the base is 1/4 inch thick.

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