Skip to the beginning of the images gallery

ORING OD 6 W 1/4

Description & Features

A standard imperial O-ring with a nominal 6-inch outer diameter and 1/4-inch width, this Hercules Sealing Products seal measures 6.03 inches in actual outer diameter, 5.48 inches in inner diameter, and 0.28 inches in width. The ORING OD 6 W 1/4 is sized for use in hydraulic and industrial sealing applications where a reliable static or dynamic face or groove seal is required at larger bore dimensions.

Manufactured by Hercules Sealing Products, this O-ring is a practical replacement or maintenance seal for hydraulic cylinders, valve bodies, and industrial equipment requiring a nominal 5-1/2-inch ID fit. Its sizing conforms to standard O-ring groove dimensions for straightforward cross-referencing and installation.

SKU: 568-433

Supplier Part Number (MPN): 568-433

Alternate Part Numbers: A-433, C1CG57, MI-08740594, MINO-00407X21616

Specifications

Actual I.D. 5.48 Inch	Actual O.D. 6.03 Inch	Actual Width 0.28 Inch	Alternate Part Numbers Alternate Part Number A-433, Alternate Part Number C1CG57, Alternate Part Number MI-08740594, Alternate Part Number MINO-00407X21616	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Nominal I.D. (in) 5-1/2	Nominal O.D. 6	Nominal Width 1/4	Supplier Part Number 568-433	Product Weight 0.05 lbs

Product Questions & Answers (2)

Question by: Howard R on May 24, 2025, 8:57 PM

Got a hydraulic cylinder that takes a 5-1/2 inch ID o-ring, this the right one to grab?

Answer by: Customer Support on May 26, 2025, 6:11 AM

Yeah, that's the one. The nominal inner diameter on this ring is 5-1/2 inches, with an actual measured ID of 5.48 inches. Outer diameter runs 6.03 inches and width comes in at 0.28 inches, so if your groove is cut for a standard nominal 6-inch OD ring with a 1/4-inch cross section, it should drop right in without any fuss.

Question by: Troy J on Mar 31, 2026, 1:33 PM

What's the actual inside diameter on this o-ring? Just wanna make sure it'll fit right.

Answer by: Customer Support on Apr 2, 2026, 9:13 AM

Its actual inner diameter measures 5.48 inches, so it should work as a replacement where a 5-1/2 inch nominal ID O-ring is needed.