USW 12/3 Twist to Lock Multi Outlet Adapter 3-ft 12 / 3-Prong Indoor/Outdoor Sjtw Heavy Duty General Extension Cord in the Extension Cords department at Lowes.com
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Amazon.com: 10 - Extension Cord Replacement Ends 5 MALE and 5 FEMALE Plug Electrical Repair : Tools & Home Improvement
2 ft. Triple Tap 3 Outlet Extension Cord
Extension Cord Electrical Wire Repair End 15 Amp 125V, US America NEMA 5-15P Male Female 3-Prong Grounding Replacement Connector
Ram-Pro 3 Wire Replacement Male Electrical Plug - House Extension Cord Heavy Duty Replacement Male Plug 3-Prong Male Electrical End Electrical Plugs & Three Prong Cord End - Amazon.com