These are real bolts from a decommissioned TITAN II intercontinental ballistic missile (ICBM)! These screws were specifically removed from the ring connecting the reentry vehicle (and its thermonuclear payload) to the rocket.
The LGM-25C TITAN II was once a critical component of the United States nuclear arsenal, designed to carry the largest warhead of any American ICBM - the B35 Thermonuclear Bomb.
This 9 megaton warhead (600x stronger than "Little Boy", the bomb dropped on Hiroshima) could annihilate targets upto 16,000km from its launch point.
The TITAN II also underwent modifications for more peaceful uses - it served as the launch vehicle for the Gemini space program.
These screws were originally sold to the public to raise funds to preserve TITAN II ICBM Site 571-7 as a historical landmark and museum. We purchased them directly from this ICBM Site.
Worldwide shipping is available and price is per screw!