50PCS M3 5.4x5.4x2mm Stainless Steel Square Machine Screw Nuts Fastener by uxcell Review

They look better in the picture than what I got. Personally a little rougher. Most of the ones I received were also thicker than 2mm. If you think about it for a Prusa printer, they are way too big.

48 out of 50 wins and almost 20 cents apiece I wanted them all. Sent for exchange and received a 23mm drill bit which I now have to return again and not sure if I can get a replacement first. But the square nut worked for what I needed.

Just installed my second E3D Hemera, they use similar square nuts. I dropped a few and can't find them. My only alternative was to order from E3D in England and wait. I found them and took a chance as they are slightly thicker at 2mm vs 1.8mm they worked just as well as the original and received them in one day. They should work in other applications where you need a square nut with a 3mm thread.

Bought for use in the Petsfang mount I printed for an E3D V6 hotend. Others listed were either thicker or more expensive. From what I've learned from other reviews, thickness would be an issue so I wanted to make sure I got a thinner nut. They were tight as they should be, but they could be installed with a few taps of a small hammer, no nut or gasket modifications were required. Seems to be the perfect size for this type of application.