A further noteworthy difference between the carriage bolts and its traditional counterpart is the fastening mechanism. The design of the carriage bolt's head makes the use of a screwdriver or other drilling devices impossible. This is why carriage bolts come with a square fitting or shank protruding from its flat side. In addition to fastening, the shank also helps grip the material, preventing it from twisting or turning, therefore making the installation or assembly simple and straightforward.
The carriage bolt variation designed for metal applications include a ribbing under the rounded head instead of the square fitting. Similar to the fasteners designed for woodworking applications, the variation helps keep the metal components in place for a better fastening. Both types of carriage bolts are commonly utilized with nuts to help secure the materials in place.
