Saint,
None of my banana plugs go "all the way" into the 5-way binding posts on Axiom speakers. The Axiom banana plugs go in about 3/4 of the length of the plug. Some other older cheapo plugs seem to have a shorter shaft and go in farther.
Conclusion? The actual length of the plug part does not seem to be standardized. Plugs for my VOM meter tend to be longer and go in all the way.
(Somehow this answer reminds me of an old joke about an actress and a bishop, but I think I better stay away from that one, lest I be banished!)
Regards,
