Flange bolts have a round flange beneath the head that distributes the load like a washer. Non-serrated flange bolts are frequently referred to as frame bolts. The flange nut is a crucial component to the flange bolt. Although it resembles a regular nut, the flange nut has a broader surface on one side to ensure even pressure distribution. The flange nut and flange bolt function well together and, in some circumstances, may result in cost savings by removing the need for additional washer purchases. A flange bolt-nut combination will never fall loose on its own if the proper torque is applied to the fasteners. These kinds of flange bolts can only be loosened by an external force, like a mechanic.