Hi Pat,
Yes they will all screw in, the OIII one is a bit fiddly, but it will go in if you line it up properly. This one was always a bit problematic and I have cleaned the threads with a thread file.
The UV/IR filter is used where there is no UV/IR filter on the camera. I'm not sure if the 60da has a UV/IR screen although I guess that it would, you may need to check this.
If you want just the narrow bands, we could do a deal perhaps.
PM me.
Cheers.
