Features: Premium steel and brass heat insert nut offer superior corrosion resistance and temperature durability, ensuring long service performances in demanding applications. accuracy machined internal thread and heat melt design create secure, vibration resistant connection for stable soldering operations with various iron tip. Ideal for electronics engineers, DIY enthusiasts, and repair technicians requiring reliable threaded fastening solution in delicate assembly work. Perfect for PCB repairs, appliance maintenance, and prototyping projects where permanent metal to plastic bonding is essential. easy installation through thermal fusions eliminates need for adhesives, while standardized thread specifications ensure compatibility with 3mm /4mm screws. Specifications: Material: Brass Package Includes: 8pcs Heat Insert Nut note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.