Various styles of terminal blocks for breadboards and robotics.

All can be printed without support.
I used 20% in-fill and 3 perimeters.

Standard size terminal blocks, in different styles/sizes. print, insert nuts, snap in metal connectors if desired, screw in a bolt or screw of your choice, wire something!

SDandButton_TB - Provides 36 terminals if all four corners are printed. SD card space, and a button holder (for reset, or whatever), for a Radio Shack Breadboard plate. Standoff columns for stacking or for a cover, mounting tabs with holes for mounting terminal block on something.

BB_mini_TB - Provides 16 terminals if all four corners are printed. Lower profile standoff columns.

onPRUSA_TB - Provides 10 terminals, mounts on an 8mm threaded rod.

mini_TB - Provides 3 terminals for on-project installation.