Kwicandelo loyilo lwemishini, uqhagamshelo kunye nenkxaso zizinto ezibalulekileyo ekufezekiseni uzinzo kunye nokusebenza kwesakhiwo. Ii-screw washers (ezikwaziwa ngokuba zii-gaskets) zizixhobo eziqhelekileyo zokuqhagamshela. Nangona zincinci, zidlala indima ebalulekileyo ekuhlanganiseni oomatshini. Eli nqaku liza kuhlola ukubaluleka kwee-screw washers, lihlalutye imisebenzi yazo, iintlobo kunye nokubaluleka kwazo kwizicelo ezisebenzayo.