quickun stainless steel reducer hex bushing, 1-1/4" male npt to 3/4" female npt, reducing bushing pipe hose fitting quickun the quickun reduceing hex bushings are pipe fittings used to connect pipes of two different thread sizes. they have male thread on the outside and female thread on the inside. pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. when purchasing pipe fittings, consider the application, as this will affect material type, shape, size, and required durability.