# Jesus nut

> English word · Noun

## Definitions
1. The nut that holds the main rotor to the mast of some helicopters.
2. A single point of failure with catastrophic consequences.

## Etymology
Possibly from the Vietnam War. From the notion that, given its critical function, if the nut were to fail, the only thing left to do would be to "pray to Jesus".

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/jesus-nut