1. Rigging. According to the Encyclopedia Britannica:
pin is a fastening device with a flange at one end and is kept in place by a cotter pin
inserted through a hole in the other end.
The idea is that the clevis pin will take all the load, while the cotter holds it in place. Also because the pin is round whatever it in pinning together have the ability to spin freely around the pin (unless secured elsewhere of course) thus allowing to truss
configurations that are not just straight lines.
Commonly used in rigging in conjunction with forks and spigots
to connect truss sections together.
Often an R-Clip
is used as the cotter pin.
Courtesy of Jamestown Distributors
2. Common male name in the South. "This is Clevis and his wife and cousin BettySueAnnRachelStephanie."