5 Simple Techniques For types of screw heads
Carriage bolt: made use of most often to attach metal to wood, a carriage bolt incorporates a clean domed head that stops the bolt from staying loosened from The top side. A nut is used about the chamfer end to tighten the bolt set up. The threads of a screw tend to be the ridges that spiral up the shank from the screw, which drive it into the mat