"Linchpin" is a song by American industrial metal band Fear Factory.

The song was released as the first single from their fourth studio album, Digimortal (2001).

The Linchpin EP was released on April 2, 2002, exclusively in Australia.

[3] The music video shows shots of machinery and what appears to be a polygraph machine intercut with footage of individual band members playing while at times being surrounded by smoke or doused in a white liquid.

A picture of the Vitruvian Man, along with a rendition of Fear Factory's logo can be seen briefly at the end of the video superimposed over lead singer Burton C. Bell.