U+1F529 · emoji since 2010
The nut and bolt fasten things tightly together. It means hardware, building, and the small parts that hold it all in place.
Figuratively it marks the nuts and bolts of something, the basic, essential details that make it work.
In texting, 🔩 does not carry a widely used hidden or slang meaning, so you can usually take it at face value. People send it just as it looks, to add a little visual touch or set the mood of a message. Only a handful of emoji have a separate texting code, and 🔩 is not really one of them.
Its official Unicode name is the Nut and Bolt emoji. In everyday chat most people just call it the nut and bolt emoji or describe what it shows. Copy and paste it from the button at the top of this page.
The 🔩 leads off a short phrase, and the rest of the words are written in cipher, every letter disguised as another emoji. Tap decipher to reveal the whole line.
Or make your own cipher in the translator.