How to Install a Truck Hitch Flag Holder | Mount It Right

Mounting a flag on your truck for a parade, tailgate, or memorial run comes down to one piece of hardware: a holder that slides into your hitch receiver. The process is simple, but skipping the right locking steps is how flags end up bouncing down the highway. Here’s the exact sequence that keeps your flagpole firmly in place, plus the compatibility traps that cause most problems.

What You Need Before You Start

The main compatibility gate is your receiver size. Every holder covered here fits a standard 2-inch hitch receiver — not the smaller 1.25-inch receivers found on some lighter trucks and SUVs. Measure your receiver opening before ordering anything.

Pole diameter matters just as much. Check your flagpole’s thickness against the holder’s spec before you start.

One more catch: the hitch pin is not always included. The eTrailer listing for the Camco CAM51611 explicitly states the 5/8-inch hitch pin and clip are sold separately, so confirm what’s in the box before you begin.

How to Install the Holder in Your Hitch Receiver

Start with the base, not the flag. Insert the hitch mount flagpole holder into your vehicle’s 2-inch receiver and secure it with the 5/8-inch pin through the aligned holes. If your kit includes an anti-rattle stabilizer, this is when it goes on: place the U-bolt, tighten the nuts evenly with a 3/4-inch open wrench or socket, and plan to recheck it periodically — the official EZ Pole guide specifically calls out that recheck step because vibration loosens it over time.

Once the base is pinned, the lock-down order from the EZ Pole install guide is:

• Assemble the flagpole and slide the swivel sleeve over the pole
• Attach the flag to the top swivel and the first loop on the sleeve
• Press the button on the pole and slide the sleeve past it so the flag stays at the right height
• Insert the pole into the holder
• Push in the safety coupler pin
• Tighten the thumbscrew

Both locking elements matter. The separate safety pin does the structural holding while the thumbscrew stops rattling — skipping either one reduces retention, and the official guide uses both.

What Are the Most Common Mistakes?

Buying for the wrong receiver size tops the list — a 1.25-inch holder cannot be adapted to a 2-inch receiver without an adapter, and even then the fit is never as solid. Assuming the pin comes with the holder is second; check the box contents before you plan the install.

Overlooking pole diameter limits is third. A pole thicker than the holder’s maximum simply will not seat properly, and one too thin will rattle even with the thumbscrew tight. Fourth is skipping the safety pin entirely and relying on the thumbscrew alone; the combined system is what keeps the pole secured at highway speeds.

Which Holder Fits Your Truck Best?

Three mainstream options cover most needs. The EZ Pole Heavy Duty Kit ships as a complete package with the dual locking system built in — a good pick if you want everything in one box.

Whether you need a complete kit or just the base, our tested roundup of the best truck hitch flag holders compares the top models side by side. For step-by-step visuals, the EZ Pole official install guide walks through the full sequence with diagrams.

One final note: no official source in this set promises legal compliance for every state or use case. Flag height laws vary by jurisdiction, so check local regulations before you drive with a pole mounted.