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Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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Description
CTO-3721X BRAKE DRUM (FRONT, 15.00" X 4")Technical Specifications Part Type Brake Drum (Stud Pilot Ball Seat) Industry Number 3721X, 3721A (Webb 66893) Brake Size 16. 5" x 7" (Friction Surface) Mounting Type Stud Pilot (Ball Seat) Features chamfered holes for tapered nuts. Bolt Holes 10 Holes Bolt Circle 11. 25" Pilot Hole 8. 78" CRITICAL SAFETY WARNING: 3721X vs. 3600AX Do not confuse these drums. They look similar but mount differently: 3721X (This Part): Stud Pilot. Holes have a chamfer
Technical Specifications
| Part Type | Brake Drum (Stud Pilot / Ball Seat) |
| Industry Number | 3721X, 3721A (Webb 66893) |
| Brake Size | 16.5" x 7" (Friction Surface) |
| Mounting Type |
Stud Pilot (Ball Seat) Features chamfered holes for tapered nuts. |
| Bolt Holes | 10 Holes |
| Bolt Circle | 11.25" |
| Pilot Hole | 8.78" |
⚠️ CRITICAL SAFETY WARNING: 3721X vs. 3600AX
Do not confuse these drums. They look similar but mount differently:
Do not confuse these drums. They look similar but mount differently:
- 3721X (This Part): Stud Pilot. Holes have a chamfer (bevel). Must use tapered nuts (Capuchón).
- 3600AX (Modern): Hub Pilot. Holes are flat. Must use flat washer nuts.
- Mixing them will cause wheel detachment.
Cross References
| Brand | Part Number |
|---|---|
| CTO | CTO-3721X |
| Automann | 145.3721AX |
| ConMet | 10009920 |
| Durabrake | 3721AX |
| Fleetrite | FLT3721AX |
| Gunite (Accuride) | 3721AX (Balanced), 3721A |
| KIC | 60000 |
| Meritor | 85-123205 |
| Webb Wheel | 66893 (Current Standard) |
Shoe Compatibility & Selection Guide
| Compatible 16.5" x 7" Shoes | |
Works with standard 16.5x7 shoes. Commonly paired with:
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|
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???? THE GOLDEN RULE OF SELECTION: Look at the wheel nuts on the truck:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 582 reviews
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Product Reviews
★★★★★ 5
So beautiful!
Size: 42inch Tall (NOT included wood planks), Color: Black, Size: 42inch Tall (NOT included wood planks), Color: Black
The poles are very sturdy. The order doesn’t come with wood but I only spent ~$15-20 on the wood and stain needed to shelve the poles. The only complaint I have is it was hard to install; mostly due to my lack of experience. It took most of the day to install and stain and cute the shelves. The poles weren’t completely flush to the wall and I couldn’t figure it out for the life of me. I love the way these turned out and I know these shelves will be coming with me to the next home I have. 10/10 would recommend, even with the hard installation. SO worth it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 26, 2019
★★★★★ 5
Fantastic for furniture making
Size: 16 x 18 Inch, Size: 16 x 18 Inch
Frankly, I didn't know what to expect... But these turned out to be exactly what I was looking and hoping for.
These table legs were so easy to assemble. They come with adjustable feet so you can have a level table no matter your tabletop shape or floor situation. Assembly is done with a simple Allen key. Printed instructions are included with simple diagrams that are so easy to follow.
Also, the seller provided all the hardware needed and more! They provided multiple black screws of different sizes that fit through the top holes of the legs, making it so easy to screw the leg base into the table top (use an electric drill with a Philips head for that). I had zero issues with any of the hardware provided.
The base has a nice smooth black powder coat application on the metal. Shipping was so quick too.
Seriously, if you are looking for a low cost, easy to assemble, good looking, and adjustable end table base, get this. I ended up making plant stands with these using some tree slices I had as you can see in my photo.
10/10 highly recommend.
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Reviewed in the United States on January 3, 2026
★★★★★ 5
Great value, sturdy product
Size: 16 x 18 Inch, Size: 16 x 18 Inch
Made a custom built 24" round resin pour table, and this worked great for the base, looks good too.
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Reviewed in the United States on April 20, 2026
★★★★★ 4
Easy to put together
Size: 16 x 18 Inch
Great legs and look great with the table, however, the legs connect to a peak and is not level. A friend made me some spacers on his 3d printer so I could use them.
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Reviewed in the United States on October 8, 2025
★★★★★ 5
Easy to put together and sturdy.
Size: 16 x 18 Inch
Perfect base for my diy coffee table. Easy to use and exactly what I needed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 5, 2026
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