The set contains 520 knurled threaded nuts, packed in a durable box. Various sizes meet different application requirements. Wide application: Threaded inserts suitable for plastic components such as mobile phone housings, PC housings, automotive plastic parts, molded parts, and 3D printed parts. Easy to use: Insert into the component’s hole and heat using a soldering iron. After heating, press the insert into the material. Allow to cool, then tighten screws. The straight knurled surface ensures secure anchoring in the host material. Sizes and quantities: M2×3: 60 pcs M2.5×3: 50 pcs M2×4: 60 pcs M2.5×4: 50 pcs M2×5: 50 pcs M2.5×5: 50 pcs M2×6: 50 pcs M2.5×6: 50 pcs M3×4: 50 pcs M3×5: 50 pcs Color: As shown in image Material: Brass Package contents: 520 hot melt threaded nuts Note: Slight variations in color and appearance may occur due to lighting, screen settings, and manufacturing batches. These differences do not affect functionality. Packaging style may vary. Measurements are subject to a tolerance of ±1–3 mm.