ERHT 3D Printing Brass Nuts Threaded Inserts M2 M2.5 M3 M4 M5 M6 Female Thread Metric Knurled Nuts Assortment Kit Brass Heat Set Insert For Plastic

4-40 6-32 8-32 (160Pcs) Standard Threaded Inserts For Plastic - Heat Set English Inserts - Knurled Nut Inserts - Threaded Brass Insert Assortment Kit

Mawalde 100Pcs M3 Thread Knurled Brass Threaded Heat Set Heat Insert Embedment Nut,M3X5X4,For 3D Printer 2.4 Etc

Bonost 500Pcs Threaded Inserts Kit M2 M3 M4 M5 - Female Thread Heat Set Insert, Brass Knurled Thread Insert Nuts For Plastic Injection Molding(Metric)

E-Z LOK Threaded Insert For Plastic Flush Brass Thread Inserts M3-0.5 Pack Of 50