Great details on these deformed thread locknut. I'm glad I asked the question just for the knowledge gained.

Dropped by Fastenal and picked up an assortment of "plain" nuts to use in temporary assemblies. Useful sizes are 10-32, 1/4-28, and 3/8-24 (landing gear). Not a chance my Lowes or HD had these in stock.

My wife donated a bottle of bright red nail polish to paint the temporaries. She'll pick up a bottle of bright yellow for marking nuts after they are torqued.