Fasten

Fasten is a verb meaning to attach or secure something in place, or to make something fast. It covers actions from fastening a button on clothing to securing a structural joint in construction, or attaching safety equipment such as seat belts and lanyards. The goal of fastening is to prevent movement, separation, or accidental release under expected loads and conditions.

Fastening methods fall into mechanical and non-mechanical categories. Mechanical fasteners rely on a physical interface that resists movement, such as bolts, screws, nuts, rivets, nails, pins, hooks, clasps, buckles, and latches. Non-mechanical methods use friction, adhesion, or magnetic attraction, including adhesives, tapes, magnetic closures, Velcro, and knotting or tying techniques. Some joints combine multiple methods for redundancy or greater strength.

Materials and design considerations: the choice of fastener depends on load, environment, temperature, corrosion potential, and whether reversibility is required. Common materials include steel and stainless steel, aluminum, brass, plastics, and textiles. Adhesives range from epoxies to polyurethanes and silicones. In safety-critical applications such as automotive, aviation, or construction, fasteners must meet standards and installation procedures, with torque limits, thread compatibility, and inspection regimes to ensure performance over time.

Removal and maintenance: Fastenings should be inspected for wear, corrosion, loosening, or fatigue. Tools and procedures should match the fastener type; improper tightening or cross-threading can compromise integrity. Proper maintenance extends service life and reduces the risk of failure.