AC WORKS 50-Amp 125/250-Volt NEMA 4-wire Grounding Heavy-duty Locking Plug, Black in the Plugs & Connectors department at Lowes.com
RV Power Cord Adapter 15 Amp Male to 50 Amp Twist Lock Female - RecPro
parkworld 1.5 ft. 6/3 3-Wire 50 Amp 125/250-Volt Twist Lock SS2-50P Plug to 50 Amp 6-50R-Outlet Welder Adapter(SS2-50P to 6-50R) 885576 - The Home Depot
Twist Lock RV 50 amp Power Cord with LED Power indictor - 50 Amp Male to 50 Amp 90 Degree Female Locking Plug 36 Foot
Quick Products Twist Lock Adapter Cord - 30A Male to 50A Twist Lock, 12 in. QP-30M50T012 - The Home Depot
Parkworld 62107
3-Prong 15A to Twist-Lock 50A RV Power Adapter 1.5 Feet (NEMA 5-15P to SS2-50R)
50 AMP RV Power Cord Locking Shore Connector Replacement End Marine Twist Lock
Reliance LL550C 12,000-Watt 50-Amp Generator Power Cord Plug — Electric Generator Depot
Amazon.com: CircleCord 4 Prong to 50 Amp Generator to RV/EV Adapter Cord with Grip Handle, L14-30P Twist Lock Male to 14-50R Female, Heavy Duty STW 10 AWG for Generator to RV Trailer
parkworld 1 ft. 10/3 STW 3-Wire Welder 50 AMP 6-50P Plug to L6-30R 30 AMP Twist Locking Receptacle Adapter Cord 691821 - The Home Depot
GearIT 50 AMP Male (NEMA 14-50P) to 30 AMP Female Twist Lock (NEMA L14