RIVNUT® – The original blind installed internally threaded rivet, was invented (patent #2,149,199) in 1936 for the purpose of attaching a rubber aircraft wing de-icer ectrusion to the leading edge of the wing. The RIVENUT® riveted the aluminum wing skin to the inner aluminum spar and then accepted a mating screw to attach the rubber de-icer.
The RIVNUT® fastener was given a military specification of MS27130 and an aerospace standard of NAS1329 and NAS1330. Use of the RIVNUT® expanded within the military and aerospace markets, and soon became popular in general industry because of its many design and assembly advantages.
United States Patent Office 2,149,199