N Scale Couplers
thingiverse
These N scale couplers can easily be used as a substitute for the Rapido style ones that come with rolling stock. They work well with most other couplers, making them a reliable temporary solution until a commercial coupler is installed. The photos clearly show a switcher using a short shank box style connector. What's more, there are inverse couplers available, allowing you to flip them over and achieve a different height. The caboose has T shank couplers installed. To ensure proper operation, I recommend drilling a small hole and adding a brass pin to the underside of these after printing and cleaning up.
With this file you will be able to print N Scale Couplers with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on N Scale Couplers.