McMaster would be your friend. But I would do it with acme thread. If it was my project I would get four nuts at the same time.. Weld two of them to a plate. With anchor holes drilled in them. Two for locking The handle on.
David
A forum community dedicated to beekeeping, bee owners and enthusiasts. Come join the discussion about breeding, honey production, health, behavior, hives, housing, adopting, care, classifieds, and more!