GoaMotors 50 Pcs Body Fasteners - 25 Bolts & 25 U-Nut Clips for Fender, Engine Cover & Splash Shield

Why I added this fastener kit to my shop

I keep a small drawer of body hardware for the inevitable missing splash shield bolt, sagging fender liner, or bumper cover that’s hanging on by two hopes and a prayer. The GoaMotors fastener set earns a permanent spot in that drawer. It’s a straightforward kit—25 indented-hex bolts with free-spinning washers and 25 matching U-nut clips—finished in black phosphate. Nothing flashy, but in daily use, the details add up.

Design and build quality

The bolts are 1/4-inch with indented hex heads and a captive, free-spinning washer. That washer matters. It’s wide enough to spread the load on plastic liners and thin sheet metal, and because it spins freely, it doesn’t wind up and scar the panel as you snug things down. The head profile sits low, so it won’t snag under a bumper lip or stick out in a wheel well.

The U-nut clips are spring steel with a uniform bend, cleanly formed threads, and a predictable bite on panel edges. They’re the style you slide over a sheet-metal flange so the bolt finds a threaded partner even where there’s no welded nut. In practice, that makes quick work of engine undertrays, belly pans, bumper covers, and fender liners where OE hardware has gone missing or corroded.

The black phosphate finish looks tidy and avoids glare under the car, but it’s worth noting it’s a light conversion coating. It offers some corrosion resistance out of the box but isn’t a substitute for zinc plating or stainless in harsh climates. For interior or underbody locations shielded from direct spray, it holds up fine. If you live where roads are salted, a dab of anti-seize or a shot of paint after installation helps longevity.

Fit, thread pitch, and compatibility

Thread pitch is the first thing I check with “universal” body bolts. These are 1/4-28 (fine thread), not 1/4-20 (coarse). That’s a plus when you’re using the included U-nuts because fine threads engage more gradually and can provide a more secure clamp in thin materials. It can be a mismatch if you’re trying to thread into an existing coarse 1/4-20 captive nut or welded nut plate on a vehicle. In my case, everything I paired with the supplied U-nuts was seamless, but when I tried to run a bolt into an existing coarse-thread bumper bracket, it halted as it should.

Bottom line: if you’re replacing both the bolt and the clip, you’re set. If you plan to re-use existing nuts or mix and match, confirm your thread pitch before you lean on a ratchet. I keep a simple thread gauge in the same drawer for exactly this reason.

The clips grip reliably on typical automotive sheet-metal flanges and the lips of plastic liners. They’re happiest on edges you can slide them over; they aren’t a fix for blind holes or push-rivet locations. As with any U-nut, work from the open side toward the fastener hole, and make sure the threaded side aligns behind the opening before you start the bolt.

Installation and day-to-day use

I used the kit to rehang a loose splash shield on a sedan and to replace a few missing fender liner bolts on a truck. The workflow is about as simple as it gets:

• Clean the mounting flange so the clip seats flat.
• Slip on the U-nut with the threaded half behind the hole.
• Bring the panel into place and start the bolt by hand through the washer.
• Snug with a nut driver or small ratchet until the washer seats.

A few practical notes from those installs:

• The indented hex head works with common nut drivers and sockets, and it’s easy to start by hand even in cramped wheel wells. I prefer a nut driver over a power tool for feel.
• The free-spinning washer prevents the “cheese grater” effect on plastic panels you get with some flange-less bolts.
• Like most body bolts, these aren’t intended for high torque. Snug is the goal; once the washer stops spinning freely and the panel is tight, you’re done. Over-torquing will deform clips or crush plastic.

If vibration is a concern—say, on a belly pan that’s seen better days—blue threadlocker on a clean bolt helps, or you can add a small nylon washer between the metal washer and the plastic to damp rattles.

Durability and corrosion

After a few months under the sedan, exposed mostly to rain and the occasional puddle, the bolts and clips still look presentable. On the truck that sees winter brine, I applied a thin coat of anti-seize to the threads and a quick shot of black paint to the heads after installation. That combination has kept red rust at bay. If you want set-and-forget corrosion resistance in aggressive environments, stainless hardware is the gold standard, but stainless U-nuts are less common and don’t always have the same spring tension. For routine repair and maintenance, the phosphate finish is acceptable—just treat it like standard automotive hardware and give it a bit of protection where it counts.

Value and versatility

As a replenishment kit, 25 matched pairs is a sweet spot. I use enough of these on small jobs that it’s nice not to ration hardware or scavenge from old parts. The set covers the typical places you need them: fender liners, bumper covers, inner splash panels, small shields around the engine bay. I’ve also pressed a couple into service for lightweight shop fixtures and a quick fix on a lawn equipment shroud. The uniform thread and clip design make it easy to build out a repair without hunting for OEM-specific fasteners.

There are more specialized options out there—metric body bolts with 10 mm heads for certain imports, Torx-head bolts for late-model European cars, and zinc-plated kits aimed at rust-belt longevity. If you know you need one of those, buy accordingly. If you need a dependable, general-purpose 1/4-inch setup with clips, this set slides neatly into that role.

What I’d change

• Clear thread pitch labeling on the packaging would save guesswork at the bench. The bolts are fine-thread, which I like with U-nuts, but it’s easy to assume coarse if you’re not paying attention.
• A light zinc plating would boost corrosion resistance, though it would also bump cost. As-is, the phosphate is fine for most use, but winter duty benefits from extra protection.
• Including a small divider box would keep pairs together in a drawer. Not a functional issue, just a convenience.

Who it’s for

• DIYers who maintain older vehicles where underbody hardware has gone missing.
• Small shops that need a reliable, consistent body bolt and clip on hand for quick repairs.
• Track and off-road folks who remove and reinstall body panels frequently and prefer a metal fastener over plastic push rivets.

If your work is exclusively on vehicles with metric hardware or specialized fasteners, you’ll want a metric kit instead. And if you’re fighting corrosion constantly, consider zinc-coated or stainless alternatives and expect to pay more.

The bottom line

I like this kit because it does the simple things right: the washer protects panels and spreads load, the clips bite cleanly and align without fuss, and the fine-thread bolts pair perfectly with the included U-nuts for a secure clamp on thin materials. It won’t replace every OEM fastener in your life, but for the common repairs—fender liners, splash shields, and light trim—it’s exactly what I reach for first.

Recommendation: I recommend the GoaMotors fastener set to anyone who needs a dependable, general-purpose 1/4-inch bolt and U-nut solution for bodywork. It’s well made, easy to use, and versatile. Just confirm you need fine-thread bolts, and if you live in a corrosive climate, add a dab of anti-seize or a quick coat of paint to keep them looking fresh.