> For A-101's I use 0.093" crimp-style connector socket pins (they cost about $0.10 US from digikey, part #A14097-ND). After soldering wire to the crimp-pin, I cover with heat-shrink tubing. It's very solid. Also works for IN-1's, though I advise using a better tube.
On a related note, does anybody have part numbers for pins that can be used to mount nixies like IN-12 and IN-18? I mean the through-hole kind, so if you solder them into your PCB, the other ends form a kind of a socket.
These sometimes appear on eBay, but in small quantities and with uncomfortably high prices. I tried looking around, but navigating the world of through-hole pins is an excercise in frustration.
--J.