A safety lampholder has center and side contacts which are concealed and cannot easily be touched by fingers when the lamp screw base is not threaded into the screwthreads. Ring and tip contacts of the lamp screw base are disposed in contact with the center and side contacts of the lampholder when the lamp screw base is threaded into position. The inside wall of the lampholder has separated steps, which have a uniform chambered angle R meeting UL specifications and which define the screwthread for mounting the lamp screw base.