Package content: You will receive 300pcs M2 M3 M4 M5 M6 threaded knurled nuts((M2x2.5x3.2 M2x3x3.2 M2x4x3.2)X30 pcs, (M2.5x4x3.5 M2.5x4x3.5 )X30 pcs, (M3x4x5 M3x5x5 M3x56x5)X30 pcs, (M4x4x6 M4x6x6 M4x8x6 )X10 pcs, (M5x6x7 M5x10x7) X10 (M6X8) X5 (1/4-40X12.7X8) X5), equipped with sturdy plastic, separately packed in compartments to stop mixing, more convenient to use.Multiple Sizes: There are 15 sizes to meet your assorted needs. With these M2 M3 M4 M5 M6 thread knurled nuts, you would favor extra convenient.High Quality Material: These threaded inserts are manufactured from nice brass, which is powerful and durable. Reliable materials and beautiful workmanship make sure its performance and service, so you can use it with confidence.Installation: These brass knurled thread insert nuts would be installed ultrasonically or thermally, or throughout the injection molding process. Brass is heat-resistant and has larger hardness and toughness than aluminum, so it's more suitable for 3D printing injection molding. With particular thread design, it is easy to operate.Versatile Applications: These threaded inserts are excellent for injection molding, fastening, or different projects. Back drilling and countersinking will not be required.Colour:yellowMaterial:brassPackage Contents:300 x Thread Knurled NutsOnly the above kit content, different products are not included.Note: Light reflection and assorted reveals could cause the color of the object in the picture a bit assorted from the real thing. The size allowed error is +/- 1-3cm.