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ST Style Urethane Wiper Ring, 3.00 Inch Rod Diameter, 3.50 Inch Wiper OD, 1/4 Inch Base Thickness

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Description & Features

This HERCULES SEALING PRODUCTS ST style wiper ring is made from urethane, making it suitable for applications with temperatures ranging from -65°F to 220°F. The ST Style Urethane Wiper Ring has a 3.00 inch rod diameter and a 3.50 inch wiper OD, with a 1/4 inch base thickness.

Wiper rings such as this one prevent contaminants from entering hydraulic cylinders.

SKU: ST-300

Supplier Part Number (MPN): ST-300

Alternate Part Numbers: C1DL43, MI-00967777, MINO-00407X20024

Specifications

Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Rod Diameter A
3
Supplier Part Number
ST-300
Thickness (in)
1/4
Product Weight
0.04 lbs
Alternate Part Numbers
Alternate Part Number C1DL43, Alternate Part Number MI-00967777, Alternate Part Number MINO-00407X20024

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Product Questions & Answers (3)

Question by: Darryl B on Jun 3, 2025, 12:11 PM
got a 3 inch rod on a cylinder that needs a new wiper, this the right size?
Answer by: Customer Support on Jun 5, 2025, 8:15 AM
For a 3.00 inch rod diameter, this is the correct fit. The wiper OD comes in at 3.50 inches with a 1/4 inch base thickness, so it seats properly in the standard groove configuration for that rod size. Urethane construction handles a wide temperature range too, down to -65°F and up to 220°F, so it holds up through most working conditions you'd throw at it.
Question by: Peggy C on Feb 8, 2026, 4:02 PM
I’ve got a 3 inch rod, is the ST-300 the right wiper size or am I gonna be fighting it?
Answer by: Customer Support on Feb 10, 2026, 6:09 AM
Fit-wise, ST-300 is sized for a 3.00 inch rod diameter and a 3.50 inch wiper outside diameter, with a 1/4 inch base thickness.
Question by: Hugh M on Apr 13, 2025, 2:15 PM
Just makin' sure, this wiper ring will fit a rod that's exactly 3 inches in diameter, right? Don't wanna order the wrong thing again.
Answer by: Customer Support on Apr 15, 2025, 1:49 PM
Urethane wiper rings in the ST style are made to fit a 3-inch rod diameter. These are built to spec, so as long as your rod is a true 3 inches, it should be a good fit.