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ST Style Urethane Wiper Ring, 4.00 Inch Rod Diameter, 4.50 Inch Wiper OD, 1/4 Inch Base Thickness

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Description & Features

Designed for hydraulic cylinder rod sealing applications, the ST Style Urethane Wiper Ring from Hercules Sealing Products fits a 4.00-inch rod diameter with a 4.50-inch OD and a 1/4-inch base thickness. The ST profile is a widely used wiper configuration suited for keeping contaminants from entering the cylinder bore during rod retraction.

Manufactured from urethane, this wiper ring is rated for temperatures from -65°F to 220°F, making it suitable for a broad range of industrial hydraulic service conditions. For higher-temperature environments, Hercules also offers a fluorocarbon version (indicated by a "V" suffix) rated up to 400°F. Urethane construction provides good abrasion resistance and flexibility, both important qualities in dynamic rod wiping applications.

SKU: ST-400

Supplier Part Number (MPN): ST-400

Alternate Part Numbers: C1DL49, MI-00967976, MINO-00407X20032

Specifications

Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Pack Size
1.00
UOM
EA
Rod Diameter A
4
Supplier Part Number
ST-400
Thickness (in)
1/4
Product Weight
0.04 lbs
Alternate Part Numbers
Alternate Part Number C1DL49, Alternate Part Number MI-00967976, Alternate Part Number MINO-00407X20032

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Product Questions & Answers (2)

Question by: Dwight B on Mar 4, 2026, 4:33 PM
Got a cylinder with a 4-inch rod that needs a new wiper, this the right size to be looking at?
Answer by: Customer Support on Mar 6, 2026, 6:58 AM
For a 4.00-inch rod diameter, yes, this is the correct fit. The OD measures 4.50 inches with a 1/4-inch base thickness, which is the standard ST style profile used in hydraulic cylinder rod wiping applications. It keeps contaminants out of the bore when the rod retracts, so getting that rod diameter matched up correctly is the main thing.
Question by: Ralph H on Apr 18, 2025, 7:03 AM
What size rod is this wiper ring made to fit?
Answer by: Customer Support on Apr 19, 2025, 3:17 PM
This ST Style Urethane Wiper Ring is made to fit a 4.00-inch rod diameter.