HSEAMALL 390PCS Threaded Insert Knurled Brass Nuts,M2 M2.5 M3 M4 M5 M6 Insert Embedment Nuts,Internal Thread Knurled Nuts for 3D Printing Plastic Parts

HSEAMALL 390PCS Threaded Inserts, M2 M2.5 M3 M4 M5 M6 Insert Nuts Brass Threaded Bushings Internal Thread Knurled Nuts Embedding Nuts Press-in Nut for Plastic Parts by Heat or Ultrasound in 3D Printer Parts?Advantage: ✅Standard and complete thread:  Deep thread,neat and clean, not easy to strip during roation, stable and reliabel. ✅Conveninet operation: Good texture,greatly improve your work efficiency. ✅The threaded insert has excellent have Excellent workmanship,smooth surface without burr. ✅Standard circular: Firm and uniform,easy to install. ✅The brass threaded insert nut Used on the injection moulding for tightly fixing ✅Apply to circuit board assembly and in the field of electronics ✅The press-in nut can be easily inserted by ultrasonic or heating (soldering iron). ❤️How to use: 1. Insert the threaded insert nut into the hole of the component. 2. Heat the threaded insert with a soldering iron without pushing the insert out of the holer heating, the threaded insert is pressed into the component. 3. Final cooling is sufficient. The plastic will once again have a good hardness to tighten the screwsifications: Colour: Gold Quantity: 390pieces Material: High quality durable brass Inner diameter: 2mm, 2.5mm, 3 mm, 4 mm, 5 mm,6mm Height:4mm, 5.7 mm,6mm, 8 mm, 9.5 mm,10mm Outer diameter: 3.2mm, 3.5mm, 4.6 mm, 6.3 mm, 7 mm, 8mmPackage content: M2 x 4 x 3.2 (100 pieces) M2.5 x 6 x 3.5 (100 pieces) M3 x 5.7 x 4.6 (100 pieces) M4 x 8.1 x 6.3 (60 pieces) M5 x 9.5  x 7(10 pieces) M6 x 10 x 8 (20 pieces)❤️Notes: It should be noted that, before the plastic is completely cooled, do not screw the bolts into the prats, otherwise the parts are