A nozzle assembly for a welding torch and a welding torch including said nozzle assembly is provided. The nozzle assembly generally comprises a nozzle body having an internal bore with a plurality of detents disposed within a portion of the internal bore and an insert assembly having a proximal exterior surface with a plurality of sealing members. The insert assembly is adapted to be secured within the internal bore of the nozzle body by the plurality of sealing members progressively engaging the plurality of detents.