FACTS ABOUT KINDS OF SCREW HEADS REVEALED

A carriage bolt, often called a coach bolt, includes a domed or countersunk head, using a shank topped by a short sq. part under the head. Unlike "common" bolts, a carriage bolt incorporates a smooth head that doesn't accept tools; in its place, counter-rotation is supplied by the sq. portion of shank.The screw heads protrude from the fabric for yo