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4040 Series M4 T Slot Nuts Roll-in Spring Ball Loaded Elastic Nuts 12 Pack Carbon Steel for 4040 Series Aluminum Extrusion Profile Rail with 8mm Slot for 3D Printer

4.7 (8) Write Review
Free shipping on orders over $29.99

$9.49

$ 3 .99 $3.99

In Stock

1.Size:?2020 Series M3 M4 M5 32pieces


About this item

  • 4040 M4 T Slot Nuts for 4040 aluminum extrusion with 8mm slot, use for T-slot aluminum profile 4040 series.
  • Spring ball loaded makes these T slot nuts sit and stay where you want them,and don't slide around while your trying to screw into them.It was so much easier than fiddling with the stock T nuts that refuse to lock in place correctly.You can insert and remove these T slot nuts easily.
  • If you work with T slot extrusions,these are a must have.These T slot nuts fits perfect on 4040 extrusion or 4040 rail with lots of different components on your rail.For you to mount something else.
  • If you also lost pieces to your printer and need replacement, they fit nice and secure in rails.Use them to add new brackets to stiffen the frame on your 3D printer (Tevo Tarantula).
  • Carbon steel :All high quality carbon steel construction,high hardness.Nickel-plated surface, rust resistance.4040 Series Aluminum Profile T-Nuts widely Use to build CNC routers, 3D printers, CNC laser cutters, CNC plasma cutters, robotics projects, 3D carvers, machine guards, workstations,and more.


Easy to be roll into T slot of aluminum profile.


I.B. Snackin
2025-09-01 10:19:04
These little things are solid. I have a bunch of 2020 v slot linear rails on my cnc machine and I needed to insert something to use to screw into for clamping. With my setup I can't just take the whole machine down without making a day of it so despite the various reviews (somewhat lack thereof) I bought them. They work very well for me. Can't speak for any other experiences out there but mine was great. They roll right in and the ball spring does a good job of helping hold it in place. Right size. Solid product. Five stars.
lokiperson
2025-08-03 13:22:11
I wanted to mount a bass shaker to my 40 series profile sim rig. The mounting holes in the shaker only fits 4-5mm bolts so I needed T-slot nuts to match those bolts. I'm a huge fan of the spring ball style and these did not disappoint. I had no issues fitting them in my profile and the 4mm bolts threaded nicely into these. The price of these was decent and I highly recommend them.
Jurist
2025-07-16 09:46:14
Used these for an airframe bending test rig and they worked perfectly. Really happy with the shipping speed compared to 80/20’s two week shipping. Quality was very good. Just keep in mind that these are drop-in T-nuts, so they can feel a little loose if they’re not in properly.
Jason G. Bourassa
2025-07-04 16:48:46
The product works as described. I should have ordered some that fit 1/4in size threads.
T2
2025-06-02 20:37:57
When I ordered these, I tried a few other brands as well. Each of these worked well. They fit well, stay in place, slide smoothly. I'm reordering now and am reordering these.
Mike Donnelly
2025-05-08 10:23:51
Fit like they grew there
Abigail Koss
2025-03-28 10:01:41
The machining quality of these was substantially lower than ones I buy from our normal vendor (Item), but the price difference is commensurate.Quality issues were: uneven machining and size inconsistency, so that many are difficult to get in and out of the slot; spring and ball bearing fell out of many of them; threads are rough.They do work and the price is right.
Heimey
2025-01-31 14:20:32
Fits perfectly in the rails of my TenLog TL-D3 Pro 3D printer. They don't spin in place like the ones that came with the printer.