A.self-tapping screws can be used for fixing the wall board, self-tapping can be screwed into the wall board and drilling.

B. self-tapping screws are to be constructed by special power tools, drilling, tapping, fixing, locking self-tapping screws tight once completed.

Self-tapping screws are mainly used for the connection and fixing of some thin plate parts,

such as the connection of color steel plate and color steel plate, the connection of color steel plate and purlin, wall beam, etc.

C.self-tapping screws are mostly used for the installation of doors and Windows.

D.the wall panel tapping screws are used for the connection between gypsum wall panel and metal keel.

The thread is double-headed thread, and the surface of the thread also has a high hardness,

which can be quickly screwed into the keel without the con.