A jaranditslid havethreadsthatfit together.
HoldonTight
Screwscomeinmanydifferentshapesandsizes.Howdoyoutakeoffthelidfromajar?Youunscrewit!Alidis a screw.
Screwskeepmorethanlidstight.Thestemofalightbulbisascrew.Thethreadsofthestemturnbetweenthethreadsinthesocket.Thethreadskeepthebulbin place.
That’sagoodthing,too!Lightbulbsintheceilinghangupsidedown.Iftheyslipout,theymightfallontoyour head!
Thethreadsonalightbulbstemscrewintothesocketofa light.
Adrillbitisascrew!Canyouseethe thread?