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HERCULES RCW-90URE-1-3/8X1-7/8X5/16

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Description & Features

Manufactured by Hercules Sealing Products, the RCW-90URE-1-3/8X1-7/8X5/16 is a male-type rod seal designed for hydraulic cylinder applications requiring reliable dynamic sealing performance. The RCW-90 profile is a well-established urethane seal geometry suited for reciprocating rod service, offering resistance to wear and extrusion in demanding hydraulic environments.

With nominal dimensions of 1-3/8" ID x 1-7/8" OD x 5/16" cross-section, this seal is sized for standard hydraulic rod and bore configurations. Hercules Sealing Products is a recognized manufacturer in the fluid power sealing industry, and this part is cross-referenced to several alternate part numbers for sourcing flexibility.

SKU: MCU-1375-D

Supplier Part Number (MPN): MCU-1375-D

Alternate Part Numbers: C1DE20, MCU-1375-G, MI-00942195, MINO-00407X15030

Specifications

Brand
HERCULES® SEALING PRODUCTS
Dimensions
5/16 in THK
Durometer
92
Inside Diameter
1.38 in
Material
Urethane
Series
MCU Series

Product Questions & Answers (1)

Question by: Wade D on Mar 13, 2026, 2:20 PM
Reckon this'll fit my cylinder? I'm usin' a 1-3/8" rod.
Answer by: Customer Support on Mar 15, 2026, 8:15 AM
This seal is designed for a 1-3/8" inside diameter, which should match your rod size perfectly. It also has a 1-7/8" outside diameter and a 5/16" cross-section, so check those dimensions against your bore, too.

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