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🔧 Upgrade your 3D prints with pro-grade threaded inserts—because your creations deserve the best!
The ruthex M3 Threaded Inserts set includes 100 brass knurled nuts designed for heat or ultrasonic embedding into thermoplastic 3D printed parts. Featuring M3 internal threading and a 5.7mm length, these inserts provide strong, corrosion-resistant, and reusable fastening solutions compatible with popular plastics like PLA, PETG, and ABS. Ideal for professional and hobbyist 3D printing applications, this set ensures durable, high-torque hold with easy installation.











| ASIN | B08BCRZZS3 |
| Best Sellers Rank | #1,723 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Nut Inserts |
| Brand | ruthex |
| Color | Metric Threaded Insert |
| Compatible Groove Diameter | 3.5 Millimeters |
| Customer Reviews | 4.8 out of 5 stars 1,477 Reviews |
| 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 | Brass |
| Material Type | Brass |
| Metal Type | Brass |
| Model | GE-M3x57-001 |
| Number Of Items | 100 |
| Number of Pieces | 100 |
| 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 | 100.0 Count |
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