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100 PCS M3 Threaded Insert M3 x 4mm x 5mm Heat Set Inserts, 3D Printing Brass...

100 Pcs M3 Threaded Insert M3 Heat Set Inserts 3D Printing Brass Nuts Knurled Tw

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300 Pcs M3 Brass Heat Inserts Threaded Knurled Nuts for 3D Printing Plastic

100 Pcs M3 Threaded Inserts, M3x5.7x4.6 Heat Set Insert for 3D Printing, Brass M