HERCULES HYDRAULICS ORING

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

does the 568-425 come in buna-n or is it something else? need to know before i order a handful of these
Question by: Norm B on Nov 17, 2025, 1:45 PM
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.
Answer by: Customer Support on Nov 19, 2025, 6:32 AM
What's the inside and outside diameter on this o-ring? Just want to make sure it'll fit my cylinder right.
Question by: Merle R on Jan 9, 2026, 12:20 PM
It measures 4.48 inches on the inside diameter and 5.03 inches on the outside. The width is 0.28 inches.
Answer by: Customer Support on Jan 11, 2026, 8:08 AM
got an o-ring groove that’s right around 4-1/2 inch on the inside, is this the one that matches?
Question by: Judy W on Jul 24, 2025, 9:36 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.
Answer by: Customer Support on Jul 26, 2025, 6:14 AM
Will this O-ring fit where I need a 4 1/2 inch ID and 5 inch OD?
Question by: Dustin S on May 25, 2025, 6:16 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.
Answer by: Customer Support on May 26, 2025, 8:59 PM