Feem ntau, countersunk- lub taub hau fasteners yog siv nyob rau hauv daim ntawv thov qhov chaw uas txuas nrog yuav tsum nyob twj ywm du thiab tsis muaj protrusions, vim hais tias lub taub hau tuaj yeem zaum hauv cov khoom. Round- lub taub hau fasteners kuj tuaj yeem zaum hauv cov khoom siv. Square- lub taub hau fasteners tso cai rau lub zog nruj dua, txawm tias lawv loj dua qhov loj. Tsis tas li ntawd, txhawm rau txhawm rau txhawm rau txhawm rau ruaj ntseg tom qab kev teeb tsa, qee qhov bolts feature qhov hauv lub taub hau lossis shank; cov qhov no tso cai rau kev nkag ntawm cov xauv pins lossis cov xov hlau los tiv thaiv lub bolt los ntawm loosening hauv kev co.
Nyob rau hauv ib co bolts, qhov unthreaded feem ntawm lub shank yog txhob txwm txo nyob rau hauv txoj kab uas hla; cov no yog hu ua waisted bolts. Cov bolts zoo li no tshwj xeeb tshaj yog rau cov kev sib txuas uas muaj peev xwm hloov tau los yog muaj zog loads. Cov qauv hlau siv tshwj xeeb siab - lub zog bolts, uas feem ntau ua rau lub taub hau loj thiab txawv qhov tshwj xeeb. Tsis tas li ntawd, muaj cov bolts tsim los rau cov kev siv tshwj xeeb: T-slot bolts-feem ntau pom nyob rau hauv lub tshuab cuab yeej fixtures-feature ib tug tshwj xeeb zoo nrog rau sab ntawm lub taub hau txiav tawm; thauj tog rau nkoj bolts yog siv los ruaj ntseg machinery rau hauv av thiab tuaj nyob rau hauv ntau yam duab; thiab U-bolts, raws li tau hais dhau los, ua haujlwm tshwj xeeb clamping lub hom phiaj. Tseem muaj tshwj xeeb weld studs, uas feature threads ntawm ib kawg thiab ib tug dawb shank ntawm lwm yam; qhov kawg kawg tuaj yeem welded ncaj qha mus rau ib qho kev tivthaiv, tso cai rau cov txiv ntoo kom nrawm ncaj qha mus rau qhov kawg threaded.