Watch how a bolt is made. Making a part for a very old lawn mower. Cutting threads with a 1937 south bend 9″ lathe. 13 threads per inch 1/2″ bar.
Here is a link to carbide tool.
https://amzn.to/2npkt1A
Parrot Original Bebop Drone Shaft and Rubber Balls Kit : https://creativebot.net/landing/view/B00VWDTU0K/Parrot-Original-Bebop-Drone-Shaft-and-Rubber-Balls-Kit
This Parrot Original Bebop Drone Shaft and Rubber Balls Kit includes 4 shafts, 12 rubber balls (4 red, 4 blue and 4 yellow) and 4 large aluminium nuts to prevent removal. :