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🔧 Upgrade your 3D prints with threaded precision that sticks like a pro!
The ruthex M3 Threaded Inserts are a premium set of 100 brass knurled nuts designed for heat or ultrasonic embedding into thermoplastic 3D printed parts. Featuring M3 internal threading and corrosion-resistant brass, these inserts provide a durable, reusable, and high-torque fastening solution compatible with popular plastics like PLA, PETG, and ABS. Ideal for professional makers and engineers seeking reliable, long-lasting thread reinforcement in their prototypes and production components.










| ASIN | B08BCRZZS3 |
| Best Sellers Rank | #1,425 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Nut Inserts |
| Brand | ruthex |
| Color | Metric Threaded Insert |
| Compatible Groove Diameter | 3.5 millimeters |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,525) |
| Drive Style | Spline |
| Exterior Finish | Brass |
| Fastener Type | Insert |
| Finish Types | Brass |
| Grade Rating | Industrial |
| Inside Thread Size | M3 |
| Item Diameter | 3 millimeters |
| Item Dimensions | 4.72 x 3.54 x 0.39 inches |
| Manufacturer | ruthex |
| Material Type | Brass |
| Metal Type | Brass |
| Model | GE-M3x57-001 |
| Number Of Items | 100 |
| Number of Pieces | 100 |
| Outside Diameter | 3 millimeters |
| Part Number | GE-M3x57-001 |
| Screw Head Style | Flat |
| Set Name | ruthex M3 Threaded Inserts - 100 Pieces RX-M3x5.7 |
| Size Name | M3x5.7 (100pcs) |
| Thread Class | Class 2A |
| Thread Coverage | Fully Threaded |
| Thread Size | M3 |
| Thread Style | Right Hand |
| Thread Type | Straight |
| Unit Count | 100 Count |
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