A while back, someone asked me on one of the threads here how I made my taps for my 1/2 inch 5 start and 3/8 inch 4 start Acme rods. I finally had time to write it up. I would not have gone through the trouble if the the nuts I needed were readily available like the 8mm nuts in the OB store. I had thought about ordering from DumpsterCNC, but it would have cost me over $100 for the number of nuts I needed. A 6" X 6" X 3/4" block of white Delrin was $18 at McMaster Carr, and I can make a lot...
Making Taps for 1/2 inch and 3/8 inch Acme precision rods
Making Taps for 1/2 inch and 3/8 inch Acme precision rods