McConkie Bolts\Nuts

[Struckie]

About 4 years ago a sample of a non return nut was being passed around in work and if memory serves me right it was called a McConkie nut. It could only be installed once and no amount of effort could make it rotate in an anti-clockwise direction. The nut was complex and had a series of rollers inside, however, I cannot seem to locate them on google now... Has anyone else come across these nuts or used them in anger - if so where can they be procured?

thanks

 

[MiketheEngineer]

Believe it or not - "sex" nuts are similair. Used in public bathrooms all the time. Where the name came from - no clue