Ana amfani da shi galibi don haɗa ƙananan sassa. Yana da kwanon rufi kai sukurori, cylindrical kai sukurori, Semi-countersunk kai sukurori da countersunk kai sukurori. Ƙarfin screw head screws ...
bm = 1d ninki biyu ana amfani dashi gabaɗaya don haɗin kai tsakanin sassa biyu na ƙarfe da aka haɗa; bm=1.25d da bm=1.5d biyu ingarma ana amfani da su gabaɗaya don haɗin haɗin haɗin simintin ƙarfe ...
Dangane da yanayin ƙarfin haɗin gwiwa, an raba shi zuwa ramuka na yau da kullun. Dangane da sifar kai: kai hexagonal, kai zagaye, kai murabba'i, shugaban countersunk da sauransu.
Lokacin isar da mu shine tsakanin kwanaki 25-45
Mafi ƙarancin odar mu shine 100.
Kayan kaya tare da samfurori kyauta ne, ana buƙatar cajin al'ada