As nouns the difference between crevis and clevis
is that crevis is (uk|dialect) the crayfish while clevis is a u-shaped coupling having holes at each end, through which a bolt is run; used especially to fit attachments to a tractor or other vehicle as it allows a degree of rotation about the bolt.
clevis
English
Noun
(Clevis fastener)
(es)
A U-shaped coupling having holes at each end, through which a bolt is run; used especially to fit attachments to a tractor or other vehicle as it allows a degree of rotation about the bolt.
Derived terms
* clevis pin