DescriptionPremium copper material, heat resistant, wear-resistant, acid-resistant rust-proof, anti-corrosive, high hardness for long time use. No need to counterbore or countersink the boss hole since the insert has guide pilot. Can be installed by ultrasonic or heat into thread tapered hole, or molded in during injection.Features- Color: Golden. - Material: Copper. - Size: 0.80 x 0.60 x 0.60cm/ 0.31 x 0.24 x 0.24 inch. - Made of brass, corrosion-resistant, heat-resistant and oxidation-resistant, hard and durable, for long-term use. - The spiral design ensures fast, stable insertion. Good positioning effect and won't destroy the plastic. - Insert into the hole, heat the threaded insert with a soldering iron.- After heating, press the threaded insert in. Then cool down and tightenscrews. The press-in nuts can easily be inserted by ultrasound or heat (soldering iron). - The threaded nuts are designed for thermoplastics. Suitable for use in most 3D printer parts.