STUD
Lug nuts and asparagus, have head on either end, may or may not have rope at either or both ends, and may even have a thread around the Wheel Bolt or stud.
Its main function is to ensure things either end, the length of these varies depending on customer needs.
C / HEXAGON
I stud also called or known as Prisoner or Allen. The main function of these is as oppressors.
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