These M8 brass heat set inserts are designed for reliable installation into plastic matrices during 3D printing or injection molding processes. The knurled outer surface provides a strong grip, while the flange design ensures a secure and even fit. Made from high-quality brass, these inserts offer excellent corrosion resistance and heat tolerance, making them ideal for repeated use in demanding applications. Each insert features a guide for easy alignment, eliminating the need for countersinking. With 20 pieces per pack, you have a sufficient supply for various projects. Please verify the dimensions and type match your specific requirements before use.