SAME DAY SHIPPING
— Order by 2pm EST.
Toggle Nav
Cart
Search
main product photo

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

Ask A Question

Description & Features

The D-Ring for Caterpillar Flanges 1.25 Inch Flange Buna-N is a specialized component designed for optimal performance in demanding industrial environments. Manufactured by Danfoss Power Solutions (II LLC Aeroquip) this high-quality spare part is made from Buna-N a material known for its excellent resistance to oils and hydraulic fluids.

With an inner diameter of 1.5 inches and an outer diameter of 1.77 inches it fits precisely into 1.25-inch flanges ensuring a reliable seal. The width of this O-ring is 0.14 inches contributing to its robust sealing capability. This D-ring can operate effectively within a temperature range of -40 to +212 degrees Fahrenheit.

Engineered for use in Caterpillar flanges this D-ring is an essential component for maintaining the integrity of your equipment. Its application is suitable for a wide range of industrial and heavy-duty machinery setups. The segment code for this part is seg_code_a.

MPN: EAR99

Supplier Part Number: FF90319-20

Specifications

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, Alternate Part Number MINO-00925X13333

Related Documents

Similar Products

Model Number Flange Size Dash Size Materials Temperature Range I.D. Width (E) O.D. Price Action
D-Ring for Caterpillar Flanges, 0.75 Inch Flange, Buna-N

FF90319-12 Caterpillar Flanges D-Ring

0.75

-12

Buna-N

-40 to +212

1 in

0.14

1.27 in

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

FF90319-16 Caterpillar Flanges D-Ring

1

-16

Buna-N

-40 to +212

1.25 in

0.14

1.52 in

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

FF90319-20 Caterpillar Flanges D-Ring

1.25

-20

Buna-N

-40 to +212

1.5 in

0.14

1.77 in

Product Questions & Answers (3)

Question by: Wade H on Dec 7, 2025, 1:30 PM
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.
Answer by: Customer Support on Dec 9, 2025, 8:50 AM
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.
Question by: Shane R on Dec 12, 2025, 6:55 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
Answer by: Customer Support on Dec 13, 2025, 9:50 PM
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.
Question by: Marvin B on Apr 13, 2025, 3:54 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?
Answer by: Customer Support on Apr 15, 2025, 10:59 AM
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.