The more I look at the picture the less I think it's part of the original mine. The manufacturing on it looks way too modern with
too little wear (unless it's far more corroded than it looks) even for sitting in the desert for 100 years... Also, could we be looking at it upside down perhaps?
Keep in mind that the most common metalworkers at the time were blacksmiths and parts standardization only started to become
really widespread beginning in the 1800's... Blacksmithing didn't really become totally obsolete until mid-1900's and professional
machinist was a relatively new profession in the early 1900's.