Plain English Meaning
A small piece of hardware that holds parts together — things like bolts, screws, rivets, and pins.
Full Definition
A hardware device used to mechanically join or secure two or more components together, such as a bolt, screw, rivet, nut, washer, pin, or clip.
Context Anchor
Pilots most often notice fasteners during preflight inspection, especially when checking panels, fairings, cowling, inspection covers, and interior fittings.
Derivation
From the verb 'fasten,' meaning to attach firmly. A fastener is simply 'the thing that fastens.' The word makes the function obvious — it holds things in place.
Why Pilots Care
Using the correct fastener maintains structural integrity and prevents in-flight failure.