Lub xub pwg screws yog ib qho kev sib txuas ntawm cov khoom siv sib txuas uas feem ntau siv los txuas cov khoom sib txuas thiab ua tau zoo hauv cov kabmob thiab kev co ib puag ncig. Nws yog tsim los muab cov ntev ntev thiab cov kab uas hla kom pom kev txhawb nqa thiab qhov chaw ntawm qhov sib txuas.
Lub taub hau ntawm cov ntsia hlau no feem ntau yog lub taub hau hexagonal lossis cylindrical lub taub hau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau lub taub hau, lub taub hau ntawm lub taub hau yog ib lub taub hau hexagonal lossis cylindrical. Nyob ntawm daim ntawv thov kev xav tau thiab cov khoom siv, lub xub pwg screws feem ntau yog ua los ntawm stainless hlau, hlau alloy, los yog carbon hlau los xyuas kom meej tias lawv muaj zog txaus thiab corrosion kuj.