These custom non-standard knurled shafts are made of high-quality 304 stainless steel, with excellent rust resistance, corrosion resistance, high strength and good wear resistance, ideal for toy assembly, mechanical positioning and small hardware fitting. With professional knurling, rolling knurl and embossing treatment, these shafts and positioning pins have strict dimensional tolerance and stable anti-slip performance, effectively preventing slipping and ensuring stable fitting. The solid structure is specially designed for toy axles and positioning use, with smooth surface and reliable assembly stability. Widely used in toy cars, mechanical equipment, precision instruments, jigs and fixtures, and hardware assembly, these 304 stainless steel knurled pins are available in full sizes M3, M4, M5, M6 to meet various non-standard customization needs. Each product is strictly inspected to ensure consistent precision and service performance. Supplied directly by the factory with non-standard customization supported, these knurled shafts and positioning pins are the preferred choice for global toy factories and hardware buyers, providing cost-effective customized positioning and connecting solutions.