Building race cars I usually try to safety wire as much as is practical. Not a big deal so I use a jug and drill press most often. However when I need more than just a few for some project I get my NAS stuff at Deering Industries in Long Beach, California , right next to Boeing Bldg. 55. For predrilled G-8 nuts and/or capscrews I hit the surplus joints and buy up all I can carry. Beyond that I am no help, sorry.