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Replacement Wingnut for Thule Cargo Boxes

Replacement Wingnut for Thule Cargo Boxes

Item # TH04877
Our Price: $4.84
Accessories and Parts
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Shipping Weight: 0.03 lbs
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Thule Accessories and Parts - TH04877

  • Roof Box
  • Hardware
  • Thule

  • Fits Thule Cargo Carriers
  • Qty. 1 wing knob
  • Carriage bolt sold separately
    • Fits M6 bolts

04877 Replacement Wingnut for Thule Cargo Boxes

Customer Satisfaction Score:

Customer Reviews

Replacement Wingnut for Thule Cargo Boxes - TH04877

Average Customer Rating:  4.9 out of 5 stars   (178 Customer Reviews)


My experience as a customer has been amazing. First, I was just happy to find custom parts for my Thule roof top storage. It's an older model so I am not always sure that newer parts are compatible. The price was fair, and sometimes you just need a couple pieces to make something like new again. These wingnuts are very convenient for taking the storage on an off of my car, but they crack over time. It's possible to DIY, but then you lose some of the ease of the shape, or it might not match the set--- which for me, I tend to notice those things.

I am very pleased with my Thule carrier which has lasted a long time, but happy I found etrailer to replace the critical infrastructure :). Now I get to enjoy and extra long lasting product to it's fullest.

The delivery was quick and the customer service people and experience is pretty amazing. They don't bombard you with advertising.


These are a perfect replacement for the my roof top carrier "U" mounts.


Needed replacement fitting for my Thule roof top carrier...these worked just perfectly...


Happy to find Thule replacement parts for equipment that I am still using after many years


I need a replacement parts for a SportRack rooftop cargo box I purchased years ago from [store]. It appears [store] does not sell these or parts for them anymore. The part number for the SportRack brackets we’re identical to these, except these have a “TH“ in front of the part number. They worked perfectly when they arrived and are exactly what I needed.


Thank you etrailer. I'm happy to have all the little pieces my roof box was missing. We're ready for adventure now.


Great replacement for lost/missing wingnut for our Thule Sidekick cargo box. Product was identical to the missing part.


Exactly as advertised. Used it to mount an old Yakima space booster cargo box, and it fits perfectly in the existing box mounting holes and on round or square bars. You can't beat the price anywhere.

Excellent. Just moved the box to another vehicle yesterday and still in great shape.
Drew B - 05/27/2016


Perfect match


My Thule Rooftop Cargo Box is 15+ years old and the carriage bolts had rusted so bad I used a bolt cutter to remove them. The rust had also made the wing nuts useless. I searched local hardware stores and the big box retailers (HD & L) but no one had the pieces I needed to replace them. I resigned myself to adapting the attachments and rigging up something that would work.

On a whim, I searched Thule Replacement parts on the web (I know, I should have done that first) and eTrailer came up with exactly what I needed!

Within a few days I had the parts in hand and the Cargo Box is good as new! I'll be coming back when it comes time order a hitch...eTrailer is a great find!


I own a Thule Big Mouth Roof Mounted Bike Rack - Frame Clamp - TH599XTR. The design comes with 2 small nuts to attach the rack to the roof bars. This wing nut makes it much easier and quicker to put the rack on the car roof.


Etrailer has some pretty obscure parts for a relatively old cargo carrier that I purchased second hand. Aside from trying to match what I needed to the product numbers, the service was good, the delivery was quick, and the parts were exactly what I needed.


Extra parts so I can use multiply Thule equipment on multiple vehicles at the same time.

Great, glad I replaced my 20 year old ones
Bryan C - 04/29/2021


Parts are good as usually comes from Thule. However ordering from Thule directly is not an easy process and for parts in particular. etrailer has very good site and easy process of finding parts and I appreciate that. Plus, I got all emails tracking my order, and that is great work. Thank you very much. Next order for Thule things I'll do on etrailer as well.



Just what I needed to make my rooftop carrier like new again. Tough to find part but found it at etrailer at a great price and quick delivery too. Thank you!


Quick and easy


Bought the hardware to attach my car roof top carrier from these folks. Very nice people to deal with and, most importantly, the hardware worked on the 3000 mile cross-country trip.


Great product selection, excellent descriptions / pictures on website, fast shipping, highly recommend!
Replacement parts for my Thule cargo box as the original parts were cracking and worries on vacation!


I bought these as replacements when I bought new U bolts since mine had rusted badly. I would definitely recommend replacing both at the same time If rusted since there is no way to clean rust or other gunk like sand from inside the nut. Both parts shipped the same day as I ordered and fit perfectly (as OEM parts should!). This past year has been a breeze mounting my carrier without fighting the rusty parts.


Purchased replacement parts for my Thule sidekick cargo carrier. The parts were exactly the pieces I needed.


After I dropped and broke one of the 4 nuts holding my bike racks to the car, I purchased 4 new ones to replace the old, brittle originals. They came in a couple days and fit just like the originals. Thanks etrailer!


We bought a used Sears X-Cargo Sport 20 Cargo Carrier but it was missing 3 of these wingnuts. Searched online and found had the most comprehensive details about which part would fit as well as the best price. Best of all, the shipping was very reasonable. Excellent experience thank you.


Item matches description perfectly. Very happy with the purchase.


Replacement U bolts and wingnuts for my Sears Cargo carrier were impossible to find until I found etrailer. My old ones were stripped. These were a perfect replacement. Good prices, fast shipping and UPS tracking made this a perfect transaction. Highly recommend etrailer.


Perfect replacement hardware for Thule roof cargo box.

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