...is a new cross-slide nut for the SIEG C0 lathe (copy of the Unimat 3). I suspect the original is made of brass, as even with good lubrication I have replaced two already due to all threading gone. For the third one I decided to take the matter into my own hands, bought a 16mm bar of SAE660 phosphor bronze, which supposedly is the most wear-resistant grade, and doubled the threaded lenght from 10 to 20mm. The part can be made with the lathe only, but since my "big mini" lathe has a milling col