A flange bolt differs from the common bolt in that it has a wider surface area under the head to provide
for an even distribution of clamping pressure. This wider surface acts like a washer, eliminating the need
to combine one with this kind of bolt. Flange bolts are available in numerous sizes, strengths, and
configurations. Like most other types of fasteners on the market, metric flange bolts are available for any
applications that require them.
Specially designed flange bolts are equipped with anti-rotational "teeth" designed to "bite" or dig into
the material one might need to fasten together. Similar to the locking rings one might see on a soda bottle
or milk jug, these teeth on the flange bolt can be turned backward, but often require more force. This type
of design is what makes a flange bolt uniquely and strategically different from a common bolt.
An essential addition to the flange bolt is the flange nut. While it is similar to an ordinary nut, one side of
the flange nut is wider than the other to ensure even pressure distribution. The flange nut and flange bolt
work well together, and in some cases may reduce costs by eliminating the need for purchasing separate
washers. Proper torque on a flange bolt-nut combination will ensure that the fasteners never become loose
by themselves. Only an outside force, such as a mechanic, can loosen these types of flange bolts.