Simple Multi-sized Parametric Spacers/Washers
thingiverse
Specify outer & inner diameters, height and number of facets, then slice and print. If you're not quite sure what size washer, spacer, plug, or whatever it is you want, play around with the settings in scad. The whole scad file is only 26 lines of code. Your exact specifications are printed as the middle object, surrounded on the left and right by +1/-1 sized. If you want a solid plug, set the inner diameter to -1 and optionally choose a bottom outer diameter larger than the top.
With this file you will be able to print Simple Multi-sized Parametric Spacers/Washers 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 Simple Multi-sized Parametric Spacers/Washers.