which are heat-resistant, rust-proof, corrosion-resistant and wear-resistant, are strong enough to ensure long-term usePerfect knurling and threading: The straight knurling surface of embedment nut allows the nut to fit tightly into the mounting object, making it difficult to slide, and the internal high-precision threads are compatible with the corresponding screwsWide range of applications: Thread inserts for plastic suit for mobile phone casings, computer casings, automotive plastic parts, injection molded parts and other plastic shell embedded partsDifferent sizes: 15 different sizes of threaded inserts in the package, M2: 4x3.5mm, M2: 6x3.5mm, M2: 8x3.5mm, M2: 10x3.5mm, M3: 4x5mm, M3: 6x5mm, M3: 8x5mm, M3: 10x5mm, M4: 4x6mm, M4: 6x6mm, M4: 8x6mm, M4: 10x6mm, M5: 6x7mm, M5: 8x7mm,M5:10x7Easy to store and carry: 330 pcs brass knurled threaded inserts are equipped with plastic boxes that you can classify as much as possible for easy storage and carryingThe surface of the nut is finely finished to ensure a smooth surface that will not scratch your hands.The high quality knurled thread insert nut classification kit is widely used for injection molding for fastening.The surface of the nut has a straight knurling, which is embedded in the injection molded partto form a certain frictional force and biting force, which can be fixed inside to prevent falling off.Material: brasscolour:goldPackage Contents:330 * Thread Knurled NutsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.