Con-Cor HO Scale Coupler Conversions

The perfect solution for all of your coupler woes. Thanks to our extensive list of HO Scale coupler conversions, it's easier than ever to fit Kadee® Couplers onto your locomotives and rolling stock. Our conversions typically require the least modification to your model, and the How-To Instructions and diagrams make fitting your new couplers a breeze. Remember to always check your coupler heights with our #206 Coupler Height Gauge. We've done the hard work for you, so find the perfect coupler in the list below.*

  Whisker® Metal Coupler Standard Coupler Other Coupler Options

4-6-4 Hudson

4-6-4 Hudson Conversion
 

4-8-8-4 Big Boy

4-8-8-4 Big Boy Conversion
 
#143 Pilot
in a
#252 Gearbox

BUDD RDC (Plastic Body)

BUDD RDC (Plastic Body) Conversion
 
 

EMD E-7A & B

EMD E-7A & B Conversion
 
 

EMD GP-38

EMD GP-38 Conversion
 
 

EMD GP-40

EMD GP-40 Conversion
 
 

EMD MP-15

EMD MP-15 Conversion
 
 

EMD SD-24

EMD SD-24 Conversion
 
 

EMD SD-35

EMD SD-35 Conversion
 
 

EMD SD-40

EMD SD-40 Conversion
 
 

EMD SW-7

EMD SW-7 Conversion
 
 

All Freight Car Kits (Wood)

All Freight Car Kits (Wood) Conversion
Any Medium Centerset Coupler

Boxcars 60’ Greenville

Boxcars 60’ Greenville Conversion
 
 

Boxcars (Empire Builder Series)

Boxcars (Empire Builder Series) Conversion
Any Medium Centerset Coupler

Box Car PS-1

Box Car PS-1 Conversion
 
 

Flat Car

Any Medium Centerset Coupler

Flat Car 54’

Flat Car 54’ Conversion
Any Medium Centerset Coupler

Mill Gondola 54’

Mill Gondola 54’ Conversion
Any Medium Centerset Coupler

Hopper Greenville

Hopper Greenville Conversion
 
 

Covered Hopper Airslide

Covered Hopper Airslide Conversion
 
 

Covered Hopper PS-2

Covered Hopper PS-2 Conversion
 
#148 or #158
in a
#252 Gearbox

Reefer

Reefer Conversion
 
 

1890 Oldie Passenger Car

1890 Oldie Passenger Car Conversion
 
#143
in a
#252 Gearbox

Gunderson 5 Unit Twin Stack

Gunderson 5 Unit Twin Stack Conversion
Any Medium Centerset Coupler

Amtrak Mail Car (60’ PD Box Car)

Amtrak Mail Car (60’ PD Box Car) Conversion
Any Medium Centerset Coupler

Amtrak Phase III Car

Amtrak Phase III Car Conversion
 
 

Streamlined Passenger Car

Streamlined Passenger Car Conversion
 

New Passenger Cars - 4 Wheel Trucks

New Passenger Cars - 4 Wheel Trucks Conversion
 
 

New Passenger Cars - 6 Wheel Trucks

New Passenger Cars - 6 Wheel Trucks Conversion
 
 

72’ Pass. Cars w/ 4 Wheel Trucks

72’ Pass. Cars w/4 Wheel Trucks Conversion
 
 

New Passenger Cars w/
Factory Body Mount

 
 

Anywhere a NO.5® is listed, the #28, #58 or #118, #119, #158, #148 Whisker® Coupler can be used in its place.

Newer models that have factory-installed knuckle couplers are easily converted by using our standard head #148 or scale head #158 Whisker® Couplers.
If you need a longer coupler, use the #146 or scale head #156 Whisker® Coupler.

Shallow cast-on gearbox fix: If you have a Kadee® Coupler that is not moving freely back and forth in a shallow cast-on gearbox. This is because some clone knuckle coupler manufacturers started molding shallow cast-on gearboxes on their models to try to fix the problems with their drooping clone knuckle couplers. The fix is a simple one. You have to file the top of the coupler shank a few strokes with a file, usually just enough to remove the black coloring to make the Kadee coupler function correctly in the non-standard shallow cast-on gearbox.

*Our conversions are based on only one model from a production run; there may be inconsistencies in a model’s production run that require a different coupler or model modifications to achieve the proper coupler height for coupler function.

** Metal Coupler Note: It is not recommended to use a metal coupler directly on a metal surface to avoid the possible electrical crossover or shorting that may cause damage.