Valterra 14-50DFR 50 AMP Single Dead Front Receptacle. Used for indoor or outdoor. 125 Volt or 240 Volt AC Power. 14-50DFR Superseded by DG50VP. Flush mount, black NEMA 5-50R. Progressive Industries Dead Front Receptacles are ideal for new installations or replacing worn out receptacles. Made of a high heat, impact-resistant plastic and heavy-duty highly conductive metal contacts. Improving conductivity and heat dissipation, making the receptacle better suited to handle the heat created by heavy loads. Traditional design makes installation straightforward and easy.