Cast in many industrial products have long been used mortgages (anchor) bolts with special heads, such that not only pull, but rotate can’t.
With the advent of high strength composite self-hardening compositions that bolt you can “lay” in the body of the finished product (plastic or metal) and making it pre-nest, and then simonaityte.
Recommend to read
SCREW FROM THE NAIL
Homebrew joke about the fact that the screw hammered by a hammer holds better than a nail wrapped with a screwdriver, I remembered in that moment, when it took a fairly long screw M6,...
“SANDWICH” IN PLACE OF THE BALSA
In the last ten years, model Aeronautics-members syut G. Votki claim with the same success at the national competitions held by the Ministry of education, repeatedly winning prizes....