Uxcell M3 M4 Brass Knurled Threaded Insert Nuts – 50Pc Metric Cylinder Embedment Nuts For 3D Prints

Got a 3D printing project or need strong threads in plastic?

These uxcell brass knurled insert nuts are the answer.

You get 50 pieces, mix of M3 and M4 metric sizes.

Just heat ‘em up and press ‘em into your print—they create durable, reusable threads.

Made of brass, knurled on the outside to grip tight.

Brand new in packaging.

Quick note: California Prop 65 warning applies, but that’s standard for brass products.

Perfect for makers, hobbyists, pros.