150 sets Screws Nuts Kit for 2020 Series Conrner Bracket Connector,150Pcs M5 T Nuts+150Pcs M5 x 8mm Hex Socket Head Screws for Aluminum Profile Ac...

Heavy duty hardware, made to last, good price for the amount you recieve

I've tried a few of these now, they fit together. Nothing was threaded wrong for me. These are nice to have around when assembling supports for my Ender 5 cover.

Fits perfect for the t slot extrusions I'm using. None of the threads of the nuts used for warped or bad so everything came together nicely!

Good low-load L brackets. I wouldn't use these for applications in heavy things, but they are a good size for lighter alluminum rail projects like those listed in the product description. The listing states that the brackets and fasteners are made of zinc which is harder than alluminum, so be careful to not over tighten if threading the fasteners into aluminum threads to prevent damaging the aluminum threads - another reason I would only recommend these for low load applications. As others have stated, these come with the wrong sized allen wrench, which isn't really a big deal but is just a minor inconvienence (and a waste on the manufacturers part). Overall good brackets though.

I tried these on my new 3D printer which uses 20mm extrusion for the vertical supports. These fit perfectly and rotate in and out as expected. These will be handy to have on hand when I want to add anything to this new printer (camera mount for instance), as well as some other projects I have in mind that might use 20mm extrusion. For those unfamiliar with this kind of drop-in T-nut, you first attach the bolt(s) and nut(s) loosely to the plate that you want to attach to the extrusion then gently push with the nut(s) aligned in the slot and with any luck they will fully self align and go into the slot. Next, you tighten the bolt/screw which will cause the nut to rotate a quarter turn inside the extrusion at which point you can finish tightening the screw. If you need to remove the plate, simply loosen partially which will eventually cause the nut to rotate a quarter turn in the opposite direction and align such that it can be removed without fully removing the screw. At less than a dime per nut and bolt, these are at a great, even if it didnt come with screws. You might want to keep a stock of other lengths of M5 screws on hand for attaching thicker plates/items to these nuts.