A secure yet rotatable and readily releasable attachment is provided between a gas nozzle and a venturi tube for a burner in a barbecue grill. The attachment is effected such that once the attachment is made between the venturi tube and the gas nozzle it will not become detached during normal operation yet can be releasable for repair purposes. In one embodiment the attachment is provided in part by an attachment member which will be placed over the gas nozzle housing and provide a frictional engagement as well as a guide for an inwardly flanged portion of the air regulator section of the venturi tube. At the same time a rotatable engagement is afforded between the air regulator of the venturi tube and the attachment member.