Professional custom non-standard positioning slotted round nuts, slotted insert mounting nuts and step nuts, manufactured by combined cold heading and precision CNC machining process. Available in carbon steel and stainless steel materials, integrally cold formed for high structural strength and wear resistance, then CNC finish turned to ensure precise dimensional tolerance, smooth thread and flawless surface without burrs. Features slotted positioning design for anti-rotation and accurate limiting; embedded mounting structure for easy assembly and flush installation; step structure plays a good role in spacing, positioning and locking. We support full customization of outer diameter, inner thread, slot size, step height and overall size according to drawings and samples. Multiple surface treatments such as galvanizing, blackening and natural finish are optional for rust prevention. Widely used in precision machinery, mold accessories, automation equipment, instrumentation and hardware assembly. Factory direct supply, support small batch proofing and mass wholesale, one-stop non-standard nut custom processing service.