These M3 Thread Heat Molding Double Twill Injection Embedment Nuts are designed for use with 3D printers and other molding applications. Made from high-quality brass, each nut features a knurled outer surface that enhances grip and pull-out resistance after installation. The double twill design allows for secure embedding during heat molding or injection processes, providing reliable torsion and tension performance. With a smooth burr-free surface and precise threads, these nuts ensure easy installation without the need for counterbore or countersink. Ideal for creating durable threaded inserts in plastic parts, this 10-piece set offers consistent quality and long-lasting durability for your projects.