I would have to expand on your comment. There are many types of threads, Standard Unified, Acme, Whitworth, Ball screws, Then there are a couple of others with different angles on the thread profile. I will say that as machine tools advanced in the late 19th century the quality of the threads improved greatly. As far as a wagon wheel being held on the axle with a nut and screw of somekind, who knows.
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Today's Featured Article - Restoration Story: 1951 Farmall H - by The Red (John Fritz). I have been a collector of Farmall tractors since 1990 when I first obtained part of the family farm in Eastern Indiana. My current collection includes a 1938 F20, 1945 H, 1946 H, and the recently purchased 1951 H. This article will focus on what I encountered and what I did to bring the 1951 NEAR DEATH Farmall H back to life.
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