Originally posted by poorbs
I read your comment about rolled threads vs. cut, and have been of the impression that the rolled threads result in the threaded area being a bit larger than the rod itself. The reason being that no metal is cut away, rather it is displaced. I would think that cutting away the metal would leave threads the same size or smaller than the rod.
Is it possible you may have it backwards?
I only know what I know from my experience, and when I buy pre threaded rods (like Dubro) which use rolled threads, the rods are of a smaller diam. wire and the threads are raised by rolling, but are rarely the exact diam. It is a cheaper and less accurate method of making threads. If you take a good machine cut bolt the same size and mic it, its the "true" size of whatever UNC or UNF size you are using.
So, if you get a rod on the low end of the thread diameter and a loser than normal clevis you have a really sloppy linkage!
Thats why I normally buy my own wire, and use a 4-40 die to cut my own threads. Much better fits. trust me! (or buy a $10 die and try it)
AJC