3. Use of Locking Mechanisms Incorporating locking washers, nylon inserts, or other locking mechanisms can help prevent bolts from loosening due to vibration. These devices provide additional friction, keeping the bolts securely in place.

Chemical anchor bolts utilize a resin-based adhesive to bond the bolt to the substrate, typically concrete. This method of anchoring offers several advantages over traditional mechanical anchors. The chemical bonding ensures a high load capacity and allows for a deeper embedment in concrete, which results in superior resistance to pull-out forces. Unlike mechanical anchors that rely solely on friction, chemical anchors distribute loads more evenly and significantly improve the overall performance of the fastening system.

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.