I designed these a while back to 3D-print cable housings for pin headers. Also made one for cheap pogo pins: https://cad.onshape.com/documents/30e7754831a9aa479

I designed these a while back to 3D-print cable housings for pin headers. Also made one for cheap pogo pins: https://cad.onshape.com/documents/30e7754831a9aa479c6cd5ac/w/ebc6d270508b817e6c3089f1/e/cd1b5f0a45fac61f41d698eb?renderMode=0&uiState=665c972971c1f274a04d038e https://cad.onshape.com/documents/30e7754831a9aa479c6cd5ac/w... For one-off things, since they (right now) require glue, and it's fiddly. But I like being able to churn out any number of pins quickly. Adding keys that stick out and attach to holes in the PCB, like the other examples mentioned in other comments, sounds nice. Related to the article: There's also the possibility of using DIP sockets with flexible legs (not the lathed ones). By bending them in an S, you get a spring loaded contact. I made a housing for it, to be used as a non-intrusive snooper on DIP EEPROMs.