H-M Supporter - Premium Member
H-M Supporter-Premium Member
- Jul 2, 2014
I have a Starrett 196a back plunge indicator set like pictured above. I am missing the 5/16" post that screws into the bar that fits the tool post, the one with the ball formed on the end, second from top in the pic. I would like to make one. As near as I can tell using a thread pitch gage in the tool post bar hole, the thread is 32 tpi, but the hole is small and my eyes and fingers are old. Also, the size is bigger than a 8-32 and smaller than 10-32. I confirmed that it is a special Starrett thread by looking at archived posts on that "other" forum. They were not kind enough to say what the actual size is...
Could someone please confirm it is 32 TPI, get me the O.D. of the thread on the post, the length of the threads and the overall length of the post?