AIEX 100pcs 3D Printing Brass Nuts, M2 Threaded Insert, Knurled Brass Nuts, Female Thread Knurled Heat Embedment Nut for 3D Printing Parts Loptop Automotive Plastic Shell (M2x3x3.5mm)

These heat inserts work pretty reliably for me if you build or buy a tool to insert them. I have so far used them successfully in PLA and resin (not resin printed but "resin cast"). In the case of the resin cast objects they do sometimes want to come out, and if tear out occurs you can simply use hot glue to seal one end of the drilled out hole, refill it with resin, let it cure, redrill, and reinsert the fitting without problems.

These work pretty well I printed holes for them with a 3.25mm drill, 3.25mm depth. Then at the top I widen the drill hole to 3.6mm for a depth of 0.75mm. That lets you place them by hand and have them sit in place before melting them in.

Not much to say, these work exactly as intended, quality is decent consistency is highWould buy again if needed

These are so cool! Super simple to include in a print, just leave an empty cylinder in the print surface (I had great results with a hole 3mm deep and 3.8mm across). Then heat a soldering iron and press fit. They stick really solidly into the print, to the point I think it's more likely the print itself would break before the insert comes loose. I'm going to find excuses to use these every chance I get.

as advertised

Heat inserts work fine and are stronger than the m2 screws i use

Used with M2 4mm screws no problem. I needed M2 because I undersized the PCB mounting holes which is my fault. These worked great, would definitely buy from this seller again.

Not as good as the ones i buy from mcmaster but for the price they work well