AIEX 100pcs 3D Printing Brass Nuts, M3 Threaded Insert Knurled Brass Nuts Female Thread Knurled Heat Embedment Nut for 3D Printing Parts Loptop Automotive Plastic Shell(M3*4.6x5.7mm)

Work well for adding high quality holes to 3d prints

Works like intended. I use a Creality Ender 3V2 for my prints with a 0.4mm nozzle. What I found works best for my prints is a 4.75mm sized hole that's at least 6mm deep to get a good fit. I pressed the nuts in slowly with a soldering iron at 200 degrees Celsius / ~400 degrees Fahrenheit. Super strong connection.

When it comes to 3D printing, you can always design a hole to be slightly smaller and hold a bolt by pressure. You can also add an empty slot and slip a nut inside to grip your bolt. But if you want a real quality hold.. this is the way to go! Installation isn’t perfect, but it also isn’t too bad. You just simply drop it in using the provided guide lip, then press it in with a soldering iron. It smoothly goes in, and it doesn’t budge once it’s cool. The force required to pull it out is pretty extreme, the teeth provide a strong hold on rotational forces, and the bolt will never strip these unless you do something seriously wrong. These are especially great for 3D printed printer upgrades that will be taken apart and put back together somewhat often but also need to remain strong and sturdy!

they set well. I use them in several of my 3d print projects

Bought these for some 3D printed projects. They installed easily and work well.

its does its job and cheap in my opinion

Needed these to finish a 3D print project, and they hold in place great

This is a quick fast and easy way to add reliable threads to any 3D printing project. Sized my hole to 4mm diameter and with a 6mm depth. These dimensions gave me a great fit on parts in every orientation. I have not run into any wear issues so far and haven’t stripped a single one, however I would not recommend using power tools to run screws in and out. Overall, 5/5 and these really are what you make of them.

Good quality for the price

Consegna rapida ed accurata

Great assortment for some projects i've been doing, very happy.

When picking out threaded inserts, there are 3 common styles that you can buy with varying prices. Ill write a TLDR at the end for those who don't want to read every detail. Obviously there will be other types of threaded inserts but these are the most common types you will probably buy. Also, these threaded inserts may be higher priced on amazon than they are on a place like ebay or aliexpress. In these reviews the prices I mention are the average prices found on ebay/aliexpress. Type 1, the cheapest inserts: The first type of threaded inserts I will mention are the cheapest ones, these are usually found on places like Ebay and come in at about 5 cents a piece. I honestly wouldn't recommend these to anyone, even if you are low on money, these are WORSE strength wise than just no threaded inserts at all! Screwing directly into the print give you about 140 (310 lbs) Kilograms of pullout strength, where these threaded inserts only give you 40 (90 lbs) Kilograms of pullout strength! they are hard to install into your 3D prints as they don't have a smaller part at the ends. This means you basically need to balance the threaded insert on your print, which can be difficult sometimes. ONLY buy these if you are using it for an application that needs to be taken apart frequently and only if you are VERY low on money. You get what you pay for. Type 2, The best value insert: These are the type of threaded inserts that I'm reviewing and are in the pictures on this review. This type of threaded inserts are the type I would recommend to 99% of people. They are easy to install because of the smaller end, they are stronger than if you used no inserts or the cheapest inserts, and are ALMOST as strong as the Type 3 inserts that I will talk about later. These come in at about 20 cents a piece and are what I would say are the best overall, good price, good strength, easy to use, and really no cons. Type 3, the high strength threaded insert: These threaded inserts are everything that the Type 2 insert is, but a little higher strength. These inserts can hold about 20 (45 lb) Kilograms more than the Type 2 insert can. These inserts come in at about 30 cents a piece. I would really only recommend these to those very rare cases where you need a threaded insert with a pull out breaking point higher than 160 Kilograms (352 lb). TLDR: Type 1, the cheapest insert: Only use these if you are VERY low on money, are using the inserts for an application that requires very little strength, and will be disassembling and reassembling often. Type 2, the good value inserts: Use these for almost every single project, they are great value and offer a high pullout strength (160 kgs, or 352 lbs) Type 3, the high strength insert: Only use these if you are working on a special project that NEEDS that extra 20 kgs (45 lbs) of pullout strength over the Type 2 inserts. Now are these particular type 2 inserts from this company (AIEX) good? Yes, they are exactly what you would expect, there are 100 inserts in the package, with great quality, I got no duds with my order.

Good quality and threads. Used them right away with no issues.