Chonde tidziwitseni zam'mimba mwake, kutalika, kuchuluka, ngakhale kulemera kwa unit ngati muli nako, kuti tipereke mawu ogwidwa mawu abwino kwambiri.
Pali standard ASTM A193 B7, A193 B8, A193 B8M, A193 B16 Thread Stud, yomwe imatha kukumana ndi ASTM. Pakadali pano, nthawi zambiri amagwiritsidwa ntchito ndi ASTM A194 2H hex nut. Onse akupezeka pano.
Thread Stud. Ntchito yolumikizira yokhazikika imagwiritsidwa ntchito kulumikiza makina. Mabawuti awiri amamangidwa kumapeto onse awiri, ndipo zomangira zapakati zimakhala zokhuthala komanso zopyapyala. Nthawi zambiri amagwiritsidwa ntchito pamakina amigodi, mlatho, magalimoto, njinga zamoto, kapangidwe kazitsulo ka boiler, nsanja yolendewera, kapangidwe kazitsulo zazitali komanso nyumba zazikulu.
1, Amagwiritsidwa ntchito kwambiri pagulu lalikulu la zida zazikulu, amafunikira kukhazikitsa zowonjezera, monga galasi, mpando wamakina osindikizira, chimango chochepetsera, etc. thupi lalikulu, kuyika kwa cholumikizira pambuyo pa mapeto ena ndi nati, chifukwa chomangiracho chimachotsedwa nthawi zambiri, ulusi udzakhala wonyezimira kapena wowonongeka, kugwiritsa ntchito ma bolts okhala ndi mitu iwiri kudzakhala kosavuta kwambiri. 2. Pamene makulidwe a thupi logwirizanitsa ndi lalikulu kwambiri ndipo kutalika kwa bolt ndi yaitali kwambiri, ma bolts awiri adzagwiritsidwa ntchito. 3. Amagwiritsidwa ntchito kulumikiza mbale zakuda ndi malo omwe ali ovuta kugwiritsa ntchito mabawuti a hex, monga denga la konkriti, denga ladenga likulendewera magawo amtundu wa monorail, ndi zina zambiri.