LUOQIUFA knurled Insert nut, M4 x 6 mm Long x 6 mm Outer Diameter Internal Threaded Brass Insert Sorting kit, 100 per Pack: Amazon.com: Industrial & Scientific
uxcell Knurled Insert Nuts - 50Pcs M4 x 8mm Length x 6.4mm OD Female Thread Brass Threaded Insert Embedment Nut for 3D Printer: Amazon.com: Industrial & Scientific
Hilitchi 460 Pcs M2 M3 M4 M5 Female Thread Brass Knurled Threaded Insert Embedment Nuts Assortment Kit, Embed Parts, Pressed Fit into Holes for 3D Prints and More Projects: Amazon.com: Industrial &
uxcell Knurled Insert Nuts - 50Pcs M4 x 5mm Length x 5mm OD Female Thread Brass Threaded Insert Embedment Nut for 3D Printer: Amazon.com: Industrial & Scientific
uxcell Knurled Insert Nuts - 100Pcs M4 x 4mm Length x 5mm OD Female Thread Brass Threaded Insert Embedment Nut for 3D Printer : Amazon.ca: Tools & Home Improvement