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D-Ring for Caterpillar Flanges, 1.00 Inch Flange, Buna-N

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Description & Features

Designed for reliability the D-Ring for Caterpillar Flanges 1.00 Inch Flange Buna-N ensures consistent performance in demanding environments. This essential component is compatible with a wide range of Caterpillar flange systems making it a versatile choice for hydraulic assemblies.

Manufactured from high-quality Buna-N material the D-Ring offers exceptional resilience and longevity even in temperature ranges from -40 to +212 degrees Fahrenheit. Its inner diameter of 1.25 inches and outer diameter of 1.52 inches ensure secure and tight seals preventing leaks and maintaining system integrity.

Featuring a width of 0.14 inches this D-Ring is designed to fit seamlessly into the 1-inch flange size. It is formatted to meet the specifications of major industry standards ensuring compatibility and performance.

MPN: C1EW77

Supplier Part Number: FF90319-16

Specifications

Dash Size
-16
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
Flange Size
1
I.D.
1.25 in
Materials
Buna-N
O.D.
1.52 in
Supplier Part Number
FF90319-16
Temperature Range
-40 to +212
Thread Sealant
No
Product Weight
0.01 lbs
Alternate Part Numbers
Alternate Part Number C1EW77, Alternate Part Number MI-03077661, Alternate Part Number MINO-00015X60103

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Product Questions & Answers (3)

Question by: Terry J on Jan 31, 2026, 7:26 AM
Will this D-ring hold up if I'm usin' it with hydraulic fluid all day long, every day?
Answer by: Customer Support on Feb 2, 2026, 7:52 AM
Designed for demanding hydraulic environments, this Buna-N D-ring offers consistent performance and longevity, even with continuous use and exposure to hydraulic fluids.
Question by: Rhonda H on Oct 5, 2025, 12:19 PM
Does this D-ring hold up when temps swing real hard, like from a cold startup in January to running all afternoon in the summer heat?
Answer by: Customer Support on Oct 6, 2025, 9:14 PM
Buna-N handles that range without much trouble. The material is rated from -40 up to +212 degrees Fahrenheit, so cold morning startups and sustained afternoon operation both fall well within what it can take. For most hydraulic equipment running through seasonal temperature swings, that window covers everyday use pretty comfortably.
Question by: Kurt S on Jan 2, 2026, 9:53 PM
got a 1 inch Caterpillar flange, is this the right d-ring size for it?
Answer by: Customer Support on Jan 4, 2026, 12:21 PM
For a 1.00 inch flange size, this D-ring is made to match that flange and it is the -16 dash size. The seal dimensions are 1.25 inch ID, 1.52 inch OD, and 0.14 inch width, which are what you want to line up for a proper fit.