220pcs Brass Heat-Set Insert Nuts M2 M2.5 M3 M4 M5 M6 Knurled Threaded Inserts for Plastic Resin Parts and 3D Printing

220pcs Brass Heat-Set Insert Nuts M2 M2.5 M3 M4 M5 M6 Knurled Threaded Inserts for Plastic Resin Parts and 3D Printing

Aliexpress UK