Self drilling screws have a point that acts as a drill bit and sharp cutting threads that tap the hole during installation. Self drilling screws are a commonly used variety of screw for quick drilling into both metal and wood. A hex head self drilling screw can typically be identified by its point and flute (notch) tip.
Fast self-drilling, drilling, tapping teeth, locking once finished, strong contact force.
Head type:socket head, round head, pan head,CSK head,Flat head, oval head, truss head, torx head cylinder head,etc
Surface Treatment:zinc plated /blue/yellow / white /Passivation/black/nickle/chrome
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