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.
Plain English
A small piece of hardware that holds parts together — things like bolts, screws, rivets, and pins.
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.
Intuition Check
Do not read fastener as anything related to going fast. Here it means a part that holds something firmly in place.
Example Sentence 1
During the walkaround, the pilot noticed a missing fastener on the inspection panel and asked the mechanic to check it before flight.
Example Sentence 2
Always replace a damaged fastener with the exact grade specified in the maintenance manual.