We offer a complete range of carbon steel mechanical components, including shaft sleeves, locking sleeves, retaining rings, positioning bushings, locking device fasteners, and custom non-standard round nuts. Crafted from premium carbon steel, all parts are manufactured via precision CNC machining and one-piece cold heading forming, delivering reliable hardness, wear resistance, and stable mechanical performance for long-term industrial use. Shaft sleeves provide effective support and wear protection for rotating components; locking sleeves ensure secure, slip-free locking; retaining rings enable precise axial positioning; positioning bushings guarantee accurate spacing and guiding; non-standard round nuts cater to specialized assembly requirements. All products feature tight dimensional tolerance, seamless mating with compatible components, and strong anti-loosening capability. Optional surface treatments are available to enhance rust and corrosion resistance, adapting to various working environments. Widely applicable in general machinery, transmission systems, automation equipment, construction machinery, and precision devices. We support full customization based on customer drawings or samples, tailoring size, thread, structure, and other specifications as needed. Each unit undergoes strict quality inspection to ensure consistent performance. Factory direct supply facilitates flexible small-batch prototyping and large-quantity wholesale, providing cost-effective solutions for mechanical manufacturing, equipment maintenance, and industrial assembly projects.