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ST Style Urethane Wiper Ring, 1.38 Inch Rod Diameter, 1.75 Inch Wiper OD, 3/16 Inch Base Thickness

Description & Features

Designed for rod wiping applications in hydraulic cylinders, this urethane seal fits a 1.375-inch rod diameter with a 1.75-inch OD and a 3/16-inch base thickness. The ST Style Urethane Wiper Ring is manufactured by Hercules Sealing Products and carries catalog number C1DL28.

Urethane construction provides a service temperature range of -65°F to 220°F, making it suitable for a broad range of industrial hydraulic equipment. A fluorocarbon version (V suffix) is also available for higher-temperature environments up to 400°F where greater thermal resistance is required.

Wiper rings in this style are used to exclude contaminants from the rod as it retracts into the cylinder, helping to protect internal sealing components from particulate ingestion and moisture intrusion.

SKU: ST-137

Supplier Part Number (MPN): ST-137

Alternate Part Numbers: C1DL28, MI-00968976, MINO-00407X20080

Specifications

Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Rod Diameter A 1.38	Supplier Part Number ST-137	Thickness (in) 3/16	Product Weight 0.01 lbs	Alternate Part Numbers Alternate Part Number C1DL28, Alternate Part Number MI-00968976, Alternate Part Number MINO-00407X20080

Similar Products

Model Number	Rod Diameter A	Wiper O.D. B	Thickness (in)
ST-125 ST Style Urethane Wiper Ring	1.25	1.625	3/16
ST-175 ST Style Urethane Wiper Ring	1.75	2.125	3/16
ST-200 ST Style Urethane Wiper Ring	2	2.5	1/4
ST-300 ST Style Urethane Wiper Ring	3	3.5	1/4
ST-100 ST Style Urethane Wiper Ring	1	1.375	3/16
ST-112 ST Style Urethane Wiper Ring	1.125	1.5	3/16
ST-118 ST Style Urethane Wiper Ring	0.188	1.563	3/16
ST-137 ST Style Urethane Wiper Ring	1.375	1.75	3/16
ST-150 ST Style Urethane Wiper Ring	1.5	1.875	3/16
ST-162 ST Style Urethane Wiper Ring	1.625	2	3/16
ST-187 ST Style Urethane Wiper Ring	1.875	2.25	3/16
ST-212 ST Style Urethane Wiper Ring	2.125	2.625	1/4
ST-225 ST Style Urethane Wiper Ring	2.25	2.75	1/4
ST-250 ST Style Urethane Wiper Ring	2.5	3	1/4
ST-275 ST Style Urethane Wiper Ring	2.75	3.25	1/4
ST-325 ST Style Urethane Wiper Ring	3.25	3.75	1/4
ST-350 ST Style Urethane Wiper Ring	3.5	4	1/4
ST-375 ST Style Urethane Wiper Ring	3.75	4.25	1/4
ST-400 ST Style Urethane Wiper Ring	4	4.5	1/4
ST-450 ST Style Urethane Wiper Ring	4.5	5.25	3/8
ST-475 ST Style Urethane Wiper Ring	4.75	5.5	3/8
ST-50 ST Style Urethane Wiper Ring	0.5	0.75	1/8
ST-62 ST Style Urethane Wiper Ring	0.625	0.875	1/8
ST-75 ST Style Urethane Wiper Ring	0.75	1.125	3/16
ST-87 ST Style Urethane Wiper Ring	0.875	1.25	3/16

Product Questions & Answers (3)

Question by: Glen A on Aug 5, 2025, 10:27 AM

What size rod does this wiper ring fit? Just want to make sure it's gonna work for my cylinder.

Answer by: Customer Support on Aug 7, 2025, 9:35 AM

This wiper ring is designed for a 1.375-inch rod diameter. The outer diameter of the wiper itself is 1.75 inches, with a base thickness of 3/16 inch.

Question by: Lance W on Jun 28, 2025, 4:18 PM

got a 1-3/8 rod on a cylinder, is this the wiper that matches it?

Answer by: Customer Support on Jun 29, 2025, 4:30 PM

The key callouts are a 1.375 inch rod diameter, a 1.75 inch wiper OD, and a 3/16 inch base thickness, which is what this ST style wiper ring is sized for.

Question by: Freddie E on Dec 13, 2025, 8:16 PM

Got a cylinder here with a 1.375 rod and the old wiper finally gave out. This ST-137 the right drop-in replacement size-wise?

Answer by: Customer Support on Dec 15, 2025, 5:24 PM

For a 1.375-inch rod diameter, that part fits exactly. The OD on the wiper measures 1.75 inches with a 3/16-inch base thickness, so if your cylinder bore and gland were built around those dimensions originally, this will seat the same way the original did. Hercules catalogs it under C1DL28, so if you have old paperwork with that number on it, you're looking at the same piece.