- "A spring used in ancient machinery. It is light and buoyant enough to float on water, and no matter how many times it's compressed it never loses tension."
- — In-game description
Ancient Springs are materials in The Legend of Zelda: Breath of the Wild. It is a Guardian Part obtained by defeating certain types of Guardians, by searching broken Guardians, or lifting legless Guardians near sources of water using the Cryonis Rune. Link can also purchase them on rainy days from the traveling merchant Teli who travels around the Necluda province. Like all Guardian Parts, it is a piece of ancient machinery created by the ancient Sheikah.
Ancient Screws can be used by Great Fairies to upgrade certain armor. At the Akkala Ancient Tech Lab the Ancient Oven Cherry can use them to forge certain types of Ancient Soldier Gear after Link relights its Furnace during "Robbie's Research". Additionally like Monster Parts, Link can use them to create Elixirs by cooking them with Frogs, Lizards, or Bugs.