Thomas Robb Coughtrie (25 November 1917 – 27 August 2008) was a chartered engineer from Motherwell, Lanarkshire, Scotland. He was credited by The Times as the inventor of the self-grip Mole wrench although this conflicts with other sources which show the invention of the Vise-Grip locking pliers in Nebraska, United States, with an initial patent in 1921 and fuller developments patented in 1924.