Where to Buy a Trailer Hitch Pin
The short answer
You can buy a trailer hitch pin at most hardware stores, auto parts stores, farm supply stores, and general retailers that carry towing accessories. Common places include Home Depot, Walmart, AutoZone, Harbor Freight, Lowe's, O'Reilly Auto Parts, Tractor Supply, Ace Hardware, and Amazon. The correct choice depends mainly on the diameter and usable length of the pin needed for your hitch receiver.
Where to find a hitch pin in person
Home Depot and Lowe's typically stock hitch pins in the towing or hardware aisle, often near trailer balls, couplers, and cargo straps. Walmart commonly carries them in the automotive section. Auto parts chains such as AutoZone and O'Reilly Auto Parts usually have a small towing display with pins, clips, and receiver locks. Harbor Freight and Tractor Supply are also reliable in-store sources, especially for standard bent-pin and clip combinations. Ace Hardware stores may carry a more limited range, but they are useful for a quick replacement if the store has a towing or fastener section.
Buying online
Amazon offers a wide selection of standard hitch pins, locking hitch pins, and replacement clips. When ordering online, check the stated pin diameter and usable length rather than relying on general terms like "standard hitch pin." A 5/8-inch diameter pin is common for many Class III and Class IV receivers, but some smaller receivers use a 1/2-inch pin. The advertised specifications should match the hole in your receiver and the mounted accessory.
How to identify the correct hitch pin
A trailer hitch pin is a cylindrical metal pin that slides through the cross-drilled hole in a receiver tube and the shank of a ball mount or other hitch accessory. A clip, cotter pin, or lock then retains it. The two measurements that matter are the pin diameter and the distance between the retaining clip hole and the head or bend. If you have the old pin, measure its diameter with a caliper or compare it against a known drill bit size. The replacement must be long enough to pass fully through the receiver and still allow the retaining clip to engage.
Look-alike pins are common, so do not rely on appearance alone. A 1/2-inch and a 5/8-inch pin can look similar side by side, but the smaller pin will be loose in a 5/8-inch receiver and may allow excessive movement. Conversely, a 5/8-inch pin will not fit a receiver drilled for 1/2-inch hardware.
Standard pins, clips, and locking alternatives
A basic kit usually includes a bent pin and a hairpin cotter or spring clip. This is the least expensive option and is adequate for routine use. A locking hitch pin replaces the simple clip with a keyed lock. It does not make theft impossible, but it reduces the chance that someone can quickly remove the receiver or ball mount. If security is a concern, consider a locking pin with a weather-resistant keyway and a rubber cap to keep out dirt and water.
What to check before buying
Confirm the pin diameter required by your receiver. Confirm the usable pin length, especially if you are retaining a thick anti-rattle bracket or multiple accessories. Decide between a standard clip-style pin and a locking pin. Check whether the retaining clip or key is included. For online purchases, verify the listed dimensions against your existing hardware before ordering.
Practical buying guidance
If you need a pin the same day, start with a hardware or auto parts store close to you and confirm the size before leaving. If you are replacing a missing pin and do not know the diameter, consult the receiver documentation for your vehicle or the attached accessory. Avoid choosing a pin solely by brand or price. A pin that is too small or too short is a safety and retention problem even if it visually appears to fit.
Availability can vary by store and region. A store may carry towing hardware seasonally, with more stock in spring and summer. If the exact size is not on the shelf, an employee in the hardware or automotive department may be able to check local inventory, but do not assume every store carries the same range as its website.