Plunger
Plunger stands for:
- a type of damper for brass instruments: plunger damper
- the piston of a pump or part of an internal combustion engine, see plunger pump
- in archery a spacer between the bow and arrow, see bow equipment # button
- part of the glass drop dosing in the glass industry (see feeder (glass) )
- some of the numbering machines used in letterpress printing
- a submarine prototype: Plunger (submarine)
- USS Plunger (SS-2) , a Plunger-class submarine , in service from 1903 to 1913
- USS Plunger (SS-179) , a Porpoise-class submarine , in service from 1936-1945
- USS Plunger (SSN-595) , a Thresher-class submarine , in service from 1962 to 1990
