METHOD OF FORMING FITTING SECTION OF INSPECTION COVER

摘要

A method of forming mounting for an inspection cover or similar in a sheet metal tank wherein threaded fasteners such as machine screws are inserted in holes burst in the sheet metal around the edges of the opening in the tank wall. The burst metal portions are then pressed into the thread of the screws to hold the screws in place as studs for the mounting of the cover. A reinforcing flange is simultaneously pressed into the sheet metal around the periphery of the opening.