Interesting. I've never heard of pins called that either, but there are threaded dowel and taper pins. If that's what they are, the thread enables you to jack them out. Put a spacer over the hole to allow space for the pin to be pulled into, then use a screw, nut, stud, or whatever is appropriate to extract the pin.
"I am often asked how radio works. Well, you see, wire telegraphy is like a very long cat. You yank his tail in New York and he meows in Los Angeles. Do you understand this? Now, radio is exactly the same, except that there is no cat." : Albert Einstein