Ok, so far the 2 stands that I have purchased have had a 1/4" male thread. Is this the standard for the stands we use in taping?
fwiw, if your stand's mounting stud has enough OD (ie., larger than 5/8") you can take it to a small machine shop in your town and have them turn it down and put on 27 threads. if you do not have enough OD for a 5/8", then perhaps a 3/8" and use an appropriate adaptor.
it shouldn't cost too much since it's only about 15min worth of labor. i bought two brand new 9.5' lighting stands from ebay for $20/ea. and the stud was 1/4". so i had my buddy remove that and turn the stock down to 3/8" w/threads.
marc