Mai ɗaure
Fasteners suna taka muhimmiyar rawa a cikin nau'ikan injiniya da masana'antu daban-daban kamar injina, gini, lif, motoci, kayan lantarki, da sauransu.
Zaɓuɓɓukan gama gari da muke amfani da su don fasteners sune:zaren fasteners, integral fasteners, non-threaded fasteners. Hexagon kai kusoshida kwayoyi, spring washers,lebur washers, Screws na kai-da-kai, kusoshi na fadadawa, rivets, zoben riƙewa, da sauransu.
Su ne mahimman abubuwan da ake amfani da su don haɗa sassa biyu ko fiye tare da tabbatar da kwanciyar hankali, mutunci da amincin tsarin. Maɗaukakin mu masu inganci na iya tsayayya da lalacewa, lalata da gajiya a cikin dogon lokaci mai amfani, tsawaita rayuwar sabis na duk kayan aiki ko tsarin, da rage kulawa da farashin canji. Idan aka kwatanta da hanyoyin haɗin da ba za a iya rabuwa da su kamar walda ba, masu ɗaure suna samar da aƙarin tattalin arziki bayani.