The 1% 4% 2014 Self-Drilling Screw A Detail-Oriented Approach to Fasteners
Design and Mechanism
Understanding Bolt Structure A Key Element in Engineering Design
2. Pilot Considerations Although these screws do not require pre-drilling, it can be beneficial in harder materials to create a pilot hole to guide the screw and reduce pressure.
The functionality of metal expansion nuts centers around the principle of mechanical expansion. Upon the application of torque, the screw or bolt is threaded into the nut, which, in turn, causes the nut to expand outward. This outward expansion presses the sides of the nut against the inner walls of the hole it occupies, creating a tight fit. The added friction and mechanical grip prevent the nut from loosening over time, even in dynamic conditions.
