M3 Threaded Inserts - 100 Pieces Rx-M3X5.7 Brass Heat Set Insert for Plastic Par

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

Threaded Insert 350Pcs M3 X L5.7 X D4.6 Heat Set Nut Brass for Industrial 3D Pri

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

300Pcs Threaded Inserts M2 M2.5 M3 M4 M5 M6 Brass Heat Set Insert for Plastic an

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