INFO
Safety wire is common in the aircraft and racing industries as an extra precaution to keep vital fasteners from loosening and parts falling off (always an added bonus when considering the life-threatening situations that can occur).
It is usually made of stainless steel, but is also available in Inconel alloys for high temperature applications.
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.