Abstract: The invention is a breakaway coupling for use in hoses carrying a high pressure fluid in the form of a gas. The coupling comprises four primary parts. A first part is attached to a first hose and a second part is attached to a second hose. The first part includes a threaded portion that couples with a threaded nut in a third body by an inserting and twisting movement. Axial forces generated by fluid flowing through the coupling must generate sufficient pressures to overcome the torsion forces holding the first and third bodies together. The third body is held within a fourth body housing and is permitted movement in a clockwise direction but prevented from movement in a counter-clockwise direction by a sprag clutch between the third body and the fourth body. The fourth body is attached to the second body. The invention includes means to create a lateral movement of fluid within the coupling to minimize axial backpressure forces that encourage decoupling.