Does anybody know what screw size and thread the 9400 and 9700 series box cars use for fastening the shell to the frame? The 6464 series uses a #4 screw with a sheet metal thread, while the 9400 and 9700 series use a machine screw thread. I tried gently testing with a 4-40 and a 4-36 tap, but neither one matched the thread. I am thinking that maybe it is metric?
TrainLarry,
Thanks for the references. Mine is definitely not 4-40. I didn't know about the #2 screws which is why I suggested it might be metric. I will have to take the screw to my local hardware store to check it out. I always like to stick to the original, no matter what I am working on. Maybe in this case I shouldn't worry about it and just use the sheet metal thread 6464 screw, which I have plenty of (?)
just a follow up for anybody reading this thread. I had the opportunity to check the thread in question and it is, in fact, 4-40.
Glad you identified the screw.
For the future, a set of Imperial and Metric screw pitch gauges will come in handy to help identify screws.
Larry