Lockdown 0.625 in. x 6 in. Self-Locking Hitch Pin at Tractor Supply Co.
Heavy Duty 5/8" Inch Tow Hitch Pin Lock for Receiver with 2 Keys - WMA Motorsports Superstore
Zone Tech Trailer Hitch Receiver Lock Anti-theft 5/8" Pin For Class Iii Iv 2" & 2-1/2" Receiver With Rubber Cap - Receiver-for Tow Trailer, Car, Boat : Target
Dead Bolt-Style Locking Hitch Pins | Buyers Products
Amazon.com: Kohree Trailer Hitch Lock 5/8 Inch, Hitch Pin Lock for Class III IV 2 Inches and 2-1/2 Inches Receiver, Locking Hitch Pin Tow Hitch Lock with Key, Safety Clip & Anti
23020 1/2" Locking Hitch Pin-23020
Amazon.com: Rhino USA Trailer Hitch Lock - Patented 5/8" Locking Receiver Pin for Class III IV Hitches - Weatherproof Anti-Theft Lockable Pin with Dust, Mud & Gunk Protection - Used to Tow