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HERCULES HYDRAULICS ORING

Description & Features

The Hercules Hydraulics O-Ring is a precision-sealing component designed for excellent performance in demanding industrial applications. With an actual inner diameter of 4.48 inches and an outer diameter of 5.03 inches, this O-Ring provides a reliable seal for hydraulic systems, ensuring minimal leakage and optimal efficiency. Its nominal dimensions, with a 4-1/2 inch ID and 5 inch OD, accommodate a range of fitting requirements.

Crafted by Hercules Sealing Products, a leader in the industry, this O-Ring is built to meet rigorous quality standards, making it a dependable choice for equipment requiring precise sealing solutions. The actual width of 0.28 inches offers robust sealing capabilities, vital for maintaining system integrity under various operational conditions.

SKU: 568-425

Supplier Part Number (MPN): 568-425

Alternate Part Numbers: A-425, C1CG49, MI-08740583, MINO-00407X21612

Specifications

Actual I.D. 4.48 Inch	Actual O.D. 5.03 Inch	Actual Width 0.28 Inch	Alternate Part Numbers Alternate Part Number A-425, Alternate Part Number C1CG49, Alternate Part Number MI-08740583, Alternate Part Number MINO-00407X21612	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Nominal I.D. (in) 4-1/2	Nominal O.D. 5	Nominal Width 1/4	Supplier Part Number 568-425	Product Weight 0.04 lbs

Product Questions & Answers (4)

Question by: Norm B on Nov 17, 2025, 1:45 PM

does the 568-425 come in buna-n or is it something else? need to know before i order a handful of these

Answer by: Customer Support on Nov 19, 2025, 6:32 AM

Buna-N is exactly what you're getting here, 70 durometer. That's a pretty standard hardness for hydraulic sealing applications, firm enough to hold up under pressure without being too stiff to seat properly.

Question by: Merle R on Jan 9, 2026, 12:20 PM

What's the inside and outside diameter on this o-ring? Just want to make sure it'll fit my cylinder right.

Answer by: Customer Support on Jan 11, 2026, 8:08 AM

It measures 4.48 inches on the inside diameter and 5.03 inches on the outside. The width is 0.28 inches.

Question by: Judy W on Jul 24, 2025, 9:36 AM

got an o-ring groove that’s right around 4-1/2 inch on the inside, is this the one that matches?

Answer by: Customer Support on Jul 26, 2025, 6:14 AM

This one is a 70 durometer Buna-N O-ring with a nominal inside diameter of 4-1/2 inches. The actual measured ID is 4.48 inches, with an actual OD of 5.03 inches and an actual width of 0.28 inches.

Question by: Dustin S on May 25, 2025, 6:16 PM

Will this O-ring fit where I need a 4 1/2 inch ID and 5 inch OD?

Answer by: Customer Support on May 26, 2025, 8:59 PM

It is designed for use in applications needing a nominal inner diameter of 4-1/2 inches and a nominal outer diameter of 5 inches, matching your stated requirements.