With all of the interest in using aviation elements in hot rods lately, I thought I would show how to safety wire like an aircraft mechanic. Sure you can go buy AC 42:13, but it helps to see it done. All it takes is patience and a little practice. First you'll want to invest in a pair of safety wire pliers. You can find them on the web pretty cheap. Mine came off of the tool truck (yes, there is a difference!) Cost me about $80, but well worth it. If they break I can get a new set next time the truck shows up. My set has lasted me over 8 years of everyday use so far. If you don't know how they work, they have a small jaw that clamps the wire with a built in set of side cutters. On the back they have a knob, when pulled, twists the wire. You will also need some stainless steel safety wire. .025 or .032 diameter will do. And of course you will need drilled head bolts. Just do a search for aviation tools or hardware. I highly recommend getting a catolog from East Coast Aviation Supply Inc. Their catolog is a great reference and they carry everything. All that you have to remember is that the wire always should pull the fastener in a tightening direction. First feed the wire through the bolt and wrap the other end around the bolt on a clockwise direction making sure the ends are even. Find the hole in the next bolt and lock the jaws of the pliers on the wire at the point where the wire just meets the next bolt. Pull the knob on the pliers and twist the wire in a clockwire direction. Pull one end of the wire through the hole in the bolt so that it will also pull it in a tightening direction. Clamp the wire again in the jaws and twist the wires in a COUNTERCLOCKWISE direction this time. Cut off the excess and make a "pigtail" You can also use th "single wire" method for bolts that make a circle like on a flywheel. Or you can use the "double twist" method on the same bolts. Once you get the idea of it, you'll find out that the possibilities are endless. All you have to remember is that the wire always pulls the fastener in a tightening direction.