Lub ntsia liaj qhov rooj yog ib tug fastener uas muaj lub taub hau thiab ib tug threaded shank (lub cev cylindrical nrog lwm threads). Nws yuav tsum tau ib tug txiv ntseej thiab yog siv los txuas ob feem nrog los ntawm qhov, muab ib tug detachable kev twb kev txuas.
Nws yog dav siv hauv tshuab, kev tsim kho, hluav taws xob, kev thauj mus los, thiab lwm yam kev lag luam, thiab feem ntau hu ua "mov ntawm kev lag luam," qhia txog nws lub luag haujlwm tseem ceeb thiab tseem ceeb hauv kev lag luam. Bolt kev sib txuas feem ntau yog muab faib ua cov ntsia hlau zoo tib yam thiab siab - lub zog ntsia hlau txuas. High- lub zog bolts tuaj yeem muab faib ua kev sib txhuam thiab hom kabmob.
Cov yam ntxwv tseem ceeb muaj xws li:
Cov Qauv Txheej Txheem: Muaj lub taub hau thiab lub shank. Hom taub hau muaj xws li lub taub hau hexagonal, countersunk taub hau, thiab lub taub hau puag ncig. Lub shank muaj cov xov sab nraud, thiab qee cov bolts muaj ib ntu du lossis lub duav nqaim tsim.
Detachability: Cov khoom sib txuas tuaj yeem sib cais los ntawm unscrewing cov txiv ntoo, ua kom yooj yim rau kev txhim kho thiab kho.
Kev Kawm Qib Siab: Bolts tau muab faib ua ntau qib zog, xws li 4.8, 8.8, thiab 10.9. Bolts qib 8.8 thiab siab dua yog siab - lub zog bolts, feem ntau yog ua los ntawm cov hlau alloy thiab cua sov- kho; bolts hauv qab qib 8.8 yog cov bolts zoo tib yam.
Cov khoom siv sib txawv: Cov khoom siv feem ntau muaj xws li carbon steel (xws li Q235, 45 steel), hlau alloy (xws li 40Cr, 35CrMo), thiab stainless hlau (xws li 304, 316). Kev xaiv cov khoom yuav tsum muaj kev xav txog lub zog, kev tiv thaiv corrosion, kub ib puag ncig, thiab tus nqi.
Anti-loosing Design: Txhawm rau tiv thaiv kom tsis txhob xoob vim kev co, qee lub bolts muaj qhov nyob hauv lub taub hau lossis shank siv nrog cotter pins, lossis lub caij nplooj ntoos hlav ntxhua khaub ncaws, tus kheej - xauv txiv ntseej, thiab lwm yam, txhawm rau txhim kho cov nyhuv nruj.
