Shapenty Female Thread Brass Cylinder Knurled Threaded Round Insert Embedment Nuts, M3 x 5 x 5mm (ID OD L), 100PCS

Used them on my Hevo and MY AM8, haven't had a single one pull out, thanks KH

I have ordered a few sets of these from different suppliers over the past couple of years and this is the best set I have received so far. The bevels on the top of the threads are nice on these, a lot of the other sets would be offset or simply not have the chamfer so I would have to manually re-tap them for smooth operation. They all seem fairly consistent as well which is unheard of in any of the other sets I received.The only reason that I am not giving 4 stars is because although they say 5mm OD they are actually 5.4mm OD ( 0.212" ). While this does not matter for most applications, it can be cause bulging in 3d prints where the hole was sized to fit an actual OD of 5mm ( printing the hole at 4.9mm ). It is not a big deal, just means I have to manually drill out the hole to 5mm before pushing these in with the soldering iron.

I was surprised when I received these that they are closed off on one end. Photos do not show this, nor is it mentioned in the description. At first I thought maybe it was one or two in the box as a defect but it was the entire box. Just be cautious if you need these to be threaded all the way through then look at other options.

Need for setting up some a few Fan Ducts for my Ender 3. Used the flat tip on my soldering iron then let it heat up and slowly pushed it in and they turned out good.