A steel pile having a wide helical blade attached at the foot; it is twisted into soft ground in order to provide a large bearing area

A screw with a Phillips head.

plural of screw-off

(Canada, US, slang) Someone who often fails to do his or her work; someone known to goof off.

Able to be removed by unscrewing.

plural of screw pump

A pump based on the Archimedean screw mechanism

(engineering) A screw cut on a solid whose sides are arcs of the periphery of a wheel into whose teeth the screw is intended to work.

Having a fitting that screws into another part

A screw by which the dip of the digitals of the keyboard of an organ may be adjusted.