HANGLIFE Threaded Inserts for Plastic, M4 Heat Set Insert for 3D Printing Components and Plastic Parts - Brass Metric Knurled Nuts (100 Pieces)

perfect for the job.Used in 3D printed parts mostly servo frames for RC aeroplanes.

Very good quality

I've found myself buying this brand in particular. They are good quality. I have bought large quantities from CNC Kitchen, but sometimes I've needed sizes I didn't have, in a hurry, so I end up in here - choose these every time. I don't put them in hot as I don't personally think that's a good idea. I fit mine using a toggle press and add they go in, you can see them rotating and effectively cutting themselves into the material. A royal pita to get out of something is wrong, so I know they work!

Great for putting 3d printed models together

It works what more do you need to know

wish there were more of the M3 sizes

Using a flat end of a soldering iron at 450C made these slide into the PLA like a knife through butter!Probably better quality than the cheap M3 screws i use in them!

These have now been used on several 3D models where inserts are needed. Fitting them using a soldering iron is very simple just take your time. Once fitted the inserts are very solid as look as you don’t over tighten them.