Exact item shown: nice micrometer style carriage stop - not sure what it was originally designed to fit, it works well. the stop part is on the hex head just past the micrometer piece. the threads that are external to the casting are corroded (I cleaned them up) as you can see, the threads inside the casting are fine - it works as it sits, you don't need to do anything, just put a nut on the threads to lock it in place if you want.
Note to me: second thin drawer
I normally ship within 24 hours of your order, but the post office does not always initiate tracking when I put the packages in the drop off box.