







🔧 Elevate your 3D prints with brass precision – because your designs deserve the best!
The ruthex RX-M3x5.7 threaded inserts are premium brass press-fit nuts designed for plastic parts, especially 3D printed enclosures. With 100 M3 inserts per pack, they offer high pull-out force and balanced torque thanks to opposite spiral knurling. Compatible with common thermoplastics like PLA, PETG, and ABS, these inserts install easily via heat or ultrasound, ensuring durable, corrosion-resistant fastening for professional-grade projects.


















| ASIN | B08BCRZZS3 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 390,426 in DIY & Tools ( See Top 100 in DIY & Tools ) 489 in Nut Inserts |
| Colour | yellow |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,410) |
| Cutting Diameter | 3 Millimetres |
| Date First Available | 20 Sept. 2020 |
| Finish | Brass |
| Head Style | Flat |
| Item Package Quantity | 1 |
| Item Weight | 30 g |
| Item diameter | 3 Millimetres |
| Item model number | GE-M3x57-001 |
| Manufacturer | LUTDTRS |
| Material | Brass |
| Number of Pieces | 100 |
| Part number | GE-M3x57-001 |
| Shape | Square |
| Size | M3 |
S**E
Great for 3D printed enclosures
I use these in every single 3D printed enclosure I design and they are perfect. Just finished off a bag of M3's and I've ordered some M4 and M5
D**S
Inserts, for inserting...
Perfectly as described.
M**N
Never used these before absolutely great easy and works very well
liked every thing about them, first time used them no issues easy worked well and will definitely now use them.
J**N
Good product
A**N
İyi ürün
C**N
Llego antes de lo esperado, todo perfecro, calidad perfecta.
M**S
Overall, I’m very happy with these heat inserts. They shipped quickly and arrived in good condition with no issues. In use, the machining appears to be high quality and the knurling is clean and consistent. Screws thread in smoothly without binding or cross-threading. I primarily use these for 3D printed parts and have not experienced any fitment or durability problems. They perform exactly as expected and I would recommend them to anyone installing threaded inserts in 3D prints.
A**E
Tolle Erfindung die kleinen Dinger!!!
Trustpilot
2 weeks ago
1 month ago