SAFETY WIRE .041

Safety Wire 1lb Can
Stainless Steel type 302/304
Safety wire (lockwire) is common in the aircraft & racing industries.  For extra precaution to keep vital fasteners from loosening and falling off from vibration or other forces. Allows for  easy visual inspection of fasteners to ensure that they have been tightened. Safety wiring of fasteners is often a requirement to pass technical safety inspections.
Usually, safety wire is threaded through a hole drilled into a fastener or part, then twisted and anchored to a second fastener or part, then twisted again, usually with the aid of safety wire pliers.