Giant pogo pin or spring probe pin for registration during electrical test
Pogo pin test fixtures should not use pogo pins for the alignments posts for the DUT (device under test). Instead the proper method is to use machined metal posts that slide into two or more mounting or guide holes of the DUT. These posts are secured to the same base plate that the pogo pin sockets are mounted. The alignment posts are tall enough that they locate the board before it engages with the testpoint pogo pins.

Sometimes you can use a technique to lower the friction of the alignment posts in the holes of the DUT by specifying three flats on the sides of the alignment posts as shown here:



(Note that the flats would normally be uniform and less exaggerated than shown in this quick sketch).