D-Ring for Caterpillar Flanges, 1.25 Inch Flange, Buna-N

Dash Size
-20
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
Flange Size
1.25
I.D.
1.5 in
Materials
Buna-N
O.D.
1.77 in
Supplier Part Number
FF90319-20
Temperature Range
-40 to +212
Thread Sealant
No
Product Weight
0.01 lbs
Alternate Part Numbers
Alternate Part Number C1EW78, Alternate Part Number MI-04149481, Alternate Part Number MINO-00015X00146

Product Questions & Answers

Is this the right size d-ring for a Cat flange that's 1 1/4 inch? Just wanna be double-dog sure before I order it.
Question by: Wade H on Dec 7, 2025, 1:30 PM
It's made to fit a 1.25-inch Caterpillar flange, with an inner diameter of 1.5 inches and an outer diameter of 1.77 inches. The width is 0.14 inches.
Answer by: Customer Support on Dec 9, 2025, 8:50 AM
got a 1.25 split flange on a Cat setup, is this the right d-ring size or am i gonna be fighting leaks
Question by: Shane R on Dec 12, 2025, 6:55 AM
For a 1.25 inch Caterpillar flange, this D-ring is sized to match. It has a 1.50 inch ID, 1.77 inch OD, and 0.14 inch width, which are the key dimensions for the seal in that flange size.
Answer by: Customer Support on Dec 13, 2025, 9:50 PM
Got a 1.25 inch Caterpillar flange that needs a new o-ring, will this one actually fit right, or do I need to double-check the dimensions first?
Question by: Marvin B on Apr 13, 2025, 3:54 PM
For a 1.25 inch Caterpillar flange, the dimensions line up. The inner diameter is 1.5 inches, outer diameter is 1.77 inches, and the width runs 0.14 inches. Those measurements are specific to that flange size, so if you are replacing a worn seal on a 1.25 inch CAT flange, this is the correct part.
Answer by: Customer Support on Apr 15, 2025, 10:59 AM

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Model Number Flange Size Dash Size Materials Temperature Range I.D. Width (E) O.D. Price Buy Now
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