Three combination screws are mostly used for the connection between thin
metal plates and play a connecting role.
When connecting, first make the threaded bottom hole of the connected
piece,
and then screw the combination screw into the thr...
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 scre...
The method of using the metering lead seal is to use the sealing wire to
thread the wiring cover and fixing screws of the meter, and then thread the two
ends of the sealing wire into the special hole of the plug body, tie the knot
firmly,
bend...
