Wall Box, Surface Mount, European, British 60mm (60.3) mounting centers. Accepts 86mmX86mm size outlets
AC WORKS 30-Amp 125/250-Volt NEMA L14-30R Flush Mounting Locking Industrial Grade Receptacle FML1430R - The Home Depot
AC WORKS 1.5ft NEMA 10-30P to NEMA 14-50R 30-Amp 3-wire To 4-wire Grounding Single To Single Yellow Basic Flexible Adapter in the Adapters & Splitters department at
Electrical Outlets & Receptacles
Stanz (TM) 50 Amp Range Receptacle Outlet for RV and Electric Vehicles, NEMA 14-50R, 3- Pole, 4 Wire, 125/250V, UL Listed Black
Square D X Series 15 Amp 125-Volt Tamper Resistant Indoor Heavy-Duty Duplex Outlet Back Wire Decorator Receptacle Matte Black SQR44111BK - The Home Depot
Leviton 30 Amp Single Surface Mounted Single Outlet, Black R20-55054-P00 - The Home Depot
Square D X Series 2-Gang Midsize Plus Duplex Outlet Wall Plate Matte Black SQWS422012BK - The Home Depot
Leviton 4934 2-Gang Flush Mount 2.15 Inch Dia. Device Receptacle Wallplate, Standard Size, Steel, Device Mount, Painted Metal : : Tools & Home Improvement
ELEGRP 30 Amp 125/250V, NEMA 10-30R Flush Mount Power Outlet, Single Straight Blade Range and Dryer Outlet Non-Grounding Black 2103S - The Home Depot
SOCKET SNAP IN PANEL MOUNT FRAME