Premium steel and brass heat insert nut superior erosion resistance and temperature durability, ensuring long service in demanding applications easy installation through thermal fusions eliminates need for adhesives, while standardized thread specifications secure compatibility with 3mm / 4mm screws accuracy machined internal thread and heat melt design create secure, shaking resistant connection for stable soldering operations with various iron tip Perfect for PCB repairs, appliance maintenance, and prototyping projects where permanent metal to bonding is essential Ideal for electronics engineers, enthusiasts, and repair technicians requiring stable threaded fastening solution in delicate assembly work, Manufacturer: Kaeltsyn