TowSmart Class 5 5/8 in. Barrel Style Receiver Lock 4 in. Span fits 2 in., 2-1/2 in. and 3 in. Receivers 7279 - The Home Depot
Big Red 5/8 in. Dia Trailer Hitch Receiver Lock Pin with Keys (2-Pack) ATRMT8026R - The Home Depot
Amazon.com: CZC AUTO Black Trailer Hitch Coupler Lock, Dia 1/4 Inch, 3/4 Inch Span for Tow Boat RV Truck Car's Coupler (1 Pack, Black) : Automotive
Heavy Duty 5/8″ Inch Stainless Steel Tow Hitch Trailer Pin with Lock for Class 3, 4, & 5 Hitches Receiver - WMA Motorsports Superstore
Trailer Coupler Hitch Lock Trailer Parts Universal Tow Ball Safe Secur – Ramptek
Amazon.com: YITAMOTOR 4-Inch Hitch Receiver Pin Lock with 5/8" Diameter, Extra Long Stainless Steel Trailer Hitch Locking Pin, Fits Class III IV 2" & 2-1/2" Receiver, Silver : Automotive
Amazon.com: Kohree 5/8 inch Trailer Hitch Locking Pin, Solid Harden Steel Tow Receiver Hitch Lock with Extra Safety Clip & Anti Rattle O-Rings Fits Class III IV V 2 inches and 2-1/2
1/4" Car Hitch Pin Lock Trailer Hitch Lock Trailer Hitch Receiver Set Black | eBay
Best Trailer Hitch Lock, Tested (2023 Guide)
B&W Tow And Stow Stainless Hitch Lock for 2 in Receiver - By B&W | Hitchsource.com