Slotted ordinary screw introduction

It is mainly used for the connection of smaller parts. There are pan head screws, cylindrical head screws, half countersunk head screws and countersunk head screws. The heads of pan-head screws and cylinder-head screws are of high strength and are connected with common parts; the head of the countersunk head screw is arc-shaped, and the top part is slightly exposed after installation, which is beautiful and smooth. Generally used in instruments or precision machinery; Countersunk head screws are not allowed where the nail heads are not allowed to be exposed.