Metal expansion nuts, often referred to as expansion anchors or expansion inserts, are specialized fasteners that expand when a bolt or screw is threaded into them. They typically consist of a cylindrical body with slits along its length or an expandable design that facilitates outward expansion. The main purpose of these nuts is to create a secure grip within a substrate, such as concrete, wood, or metal, thereby preventing loosening due to vibrational forces, temperature fluctuations, or stress.

In modern construction and manufacturing, the choice of fasteners plays a crucial role in ensuring structural integrity and longevity. Among the various types of screws available, wafer head reamer self-drilling screws have gained significant attention due to their unique design and functionality. This article delves into the features, advantages, and applications of wafer head reamer self-drilling screws.

To effectively use hex head bolts, corresponding nuts are required to create secure joints. Hex nuts, which share the same hexagonal shape, allow for a snug fit around the bolt. Similar to bolts, these nuts come in various grades and materials to match the properties of the bolts they are paired with.