200Pcs M2 M2.5 M3 Metric Female Thread Knurled Brass Threaded Insert Embedded Nuts Assortment Kit Knurl Nuts for 3D Printing

200Pcs M2 M2.5 M3 Metric Female Thread Knurled Brass Threaded Insert Embedded Nuts Assortment Kit Knurl Nuts for 3D Printing

Aliexpress UK