Muaj ntau lub npe rau screws, thiab txhua tus neeg yuav muaj ntau lub npe. Qee tus neeg hu lawv cov ntsia hlau, qee cov neeg hu lawv cov qauv, thiab qee cov neeg hu lawv cov fasteners. Txawm hais tias muaj ntau lub npe, tab sis lub ntsiab lus yog tib yam, lawv txhua tus screws. Screw yog ib lo lus dav dav rau lub fastener. Lub hauv paus ntsiab lus ntawm cov ntsia hlau yog siv cov qauv ntawm lub cev thiab kev ua lej ntawm oblique ncig kev sib hloov ntawm cov khoom thiab kev sib txhuam quab yuam kom maj mam zawm cov cuab yeej ntawm cov khoom siv.
Screws yog qhov tseem ceeb hauv lub neej niaj hnub thiab kev tsim khoom lag luam, yog li screws tseem hu ua mov ntawm kev lag luam. Scope ntawm daim ntawv thov ntawm screws suav nrog: cov khoom siv hluav taws xob, cov khoom siv kho tshuab, cov khoom siv digital, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob electromechanical. Nkoj, tsheb, hydraulic engineering, thiab txawm tias kev sim tshuaj lom neeg kuj siv cov ntsia hlau.
Muaj ntau ntau hom screws, seb nws yog ib tug me me ntsia hlau rau iav los yog ib tug loj ntsia hlau rau loj hnyav hluav taws xob engineering. Qhov tseeb ntawm cov ntsia hlau feem ntau yog 6g (chav kawm 2, Asmeskas tus qauv "IFI" yog 2A cov hniav), thiab cov ntsia hlau ntxhib siv hauv kev tsim kho yog 1g.
Screws yog dav siv, yog li ntawd cov ntsia hlau ua lag luam yog loj, uas ua rau ntau manufacturers tsim screws. Thaum cov neeg yuav khoom xaiv lub chaw tsim khoom ntsia hlau, lawv yuav tsum nkag siab qee qhov kev paub txog kev ua haujlwm ntawm cov ntsia hlau, xws li cov ntsia hlau cais cov qauv kev qhia tshwj xeeb thiab American cov lus qhia tshwj xeeb.
