DIYers and repair folks, this set of Yinpecly M3 Copper Knurled Threaded Insert Nuts is super handy for all sorts of projects. You get 30 pieces in a gold-tone finish, made from copper, which offers good thermal conductivity and heat resistance. These inserts have a knurled outer surface that helps them grip tightly when installed into plastic, wood, or other materials—perfect for creating strong, threaded holes in softer materials. They’re designed with a guide pilot, so you don’t need to counterbore or countersink the boss hole, making installation easier. You can install them using ultrasonic methods, heat insertion, or even mold them in during injection molding processes. The specs: M3 thread size, 5mm height, 5mm outer diameter, and a 0.5mm pitch. They’re commonly used in electrical appliances, prototypes, 3D printing, or any project where you need a durable, reusable threaded insert. Whether you’re fixing a gadget, building a custom piece, or working on electronics, having these on hand can save you a lot of hassle. They’re small, affordable, and really useful. Just make sure you have the right tools for installation. A great addition to your workshop supplies!
