in-saiL 100pcs/lot M3x4.0mm, OD4.6mm Heat Staking Threaded Insert Quik-Tek Brass C3604

Easily melts into a 4mm hole in a 3d print, and holds way better than threading into the plastic.

Will use the as inserts on a 3d printed device for a threaded capture where the plastic wont accept the tapping of machine screw threads.

Very easy to install with use of a soldering iron and some pressure applied to a 3d printed part. Used mostly with PLA parts for mating enclosures.

They do what they are supposed to do! What can I say, they are as described.

These are perfect for the Hero Me Fan system. They are of good quality. Highly recommend them.

If you are still using captured nuts on your prints give these a shot. Incorporating them into your designs is fun, not much harder than captured hex nuts and once theyre in, they stay in.