>> Though I wince a bit at the name, my impression is that it's a dying
usage...perhaps you might wish to explain it for the curious? <<

   Because Jesus clip is a much easier term than castellated nut keeper
from turninger thingie, or throttle linkage preventer from coming apart
device.

>>  And how it differs from the similarly named device on a UH1A
helicopter? <<

   Sorry- can't.   I'm not qualified to answer any questions pertaining to
helicopters or helicopter maintenance.

George/ATL