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O-RING OD 1-1/16 W 1/16

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Description & Features

Manufactured by Hercules Sealing Products, this O-Ring is essential for hydraulic applications requiring a reliable sealing solution. With an outer diameter of 1-1/16 inches and a width of 1/16 inch, it provides a precise fit for various industrial needs. Designed to prevent leaks and maintain system integrity, this O-Ring is ideal for ensuring efficient operation in demanding environments.

Constructed from high-quality materials, this O-Ring offers durability and resistance to wear, making it suitable for long-term use. It is compatible with a range of hydraulic systems, ensuring versatility across different equipment. The dimensions and material quality of this O-Ring make it a critical component in maintaining the performance and reliability of hydraulic systems.

SKU: A-021-90D

Supplier Part Number (MPN): 568-021-90D

Alternate Part Numbers: C1FV81

Specifications

Brand
HERCULES® SEALING PRODUCTS
Color
Black
Cross Section Shape
Round
Dash Size
21
Durometer
90
Material
Buna-N
Series
568 Series
Suitable For Use With
Hydraulic Cylinders
System of Measurement
Imperial

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Product Questions & Answers (4)

Question by: Gary R on Dec 15, 2025, 9:06 PM
got an old seal on a hydraulic fitting that measures out to 1-1/16 outside diameter with a 1/16 cross section, this the right part to be lookin at?
Answer by: Customer Support on Dec 17, 2025, 12:48 PM
Those dimensions match up exactly. The A-021-90D from Hercules Sealing Products carries a 1-1/16 inch OD with a 1/16 inch width, so if your worn seal measures to those specs, you're looking at the correct replacement.
Question by: Tony R on Apr 20, 2025, 2:37 PM
got a groove that needs an o-ring, is this one actually 1-1/16 on the outside and 1/16 thick?
Answer by: Customer Support on Apr 21, 2025, 5:19 PM
For size, the product is identified as an O-ring with a 1-1/16 inch outside diameter and a 1/16 inch width.
Question by: Cindy S on Dec 15, 2025, 1:07 PM
Will this fit a standard -021 groove? Just need to replace a leaky one.
Answer by: Customer Support on Dec 16, 2025, 5:51 PM
This o-ring is a size -021, so it should fit a standard -021 groove. Just make sure your old one matches these dimensions (1-1/16" OD, 1/16" width).
Question by: Lynn M on Jun 2, 2025, 12:58 PM
Is this here O-ring gonna fit standard size housings?
Answer by: Customer Support on Jun 4, 2025, 7:00 AM
This O-ring has an outer diameter of 1-1/16 inch and a width of 1/16 inch.

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