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HANGLIFE Heat-Set Threaded Inserts, M6 Heat Set Insert For 3D Printing Components And Plastic Parts - Brass Metric Knurled Nuts (50 Pieces)

Yaocom 300 Pcs M4 Threaded Inserts M4 X D6 X L6 Heat Set Inserts Brass 3D Printing Knurled Metric Nuts For Plastic, 3D Printing Components

ELCJDZYO 300Pcs Threaded Inserts M2 M2.5 M3 M4 M5 M6 Brass Heat Set Insert For Plastic And 3D Printing Components

ZWMSSLL M4 Heat-Set Threaded Inserts, M4x6x6mm(200Pieces) Heat Set Insert For 3D Printing Components And Plastic Parts,Brass Metric Knurled Nuts