Slotted nut | Article about slotted nut by The Free Dictionary
slotted nut[′släd·əd ′nət]
A regular hexagon nut with slots cut across the flats of the hexagon so that a cotter pin or safety wire can hold it in place.
References in periodicals archive
The best method of tightening this slotted nut
is to use a wrench that fits over the magazine tube.
A castle nut (also called a castellated nut or slotted nut
) with cotter pin is used to secure the wheel hub to the vehicle.