Dome Cap Nut With Internal Thread

This component features an integrated design with a dome-shaped head and a cylindrical base, equipped with a precision internal thread at the bottom center. Commonly used at the ends of piping systems or to protect shaft ends in mechanical equipment, it seals internal threads to prevent foreign object ingress while eliminating safety hazards from sharp edges through its smooth, arched surface. It is frequently applied in decorative areas of bathroom hardware, fluid control valves, and precision instruments.

The part body is typically machined from solid bar stock using CNC turning. Key processing focuses include controlling the concentricity between the outer profile and the internal thread to ensure perpendicularity and sealing performance during assembly. The curvature radius of the top spherical surface strictly adheres to drawing requirements to guarantee consistent appearance in mass production. The internal threads undergo go/no-go gauge testing to ensure mating precision complies with ISO or ANSI standards. Depending on the operating environment, materials such as brass, stainless steel, or carbon steel can be selected, with corresponding passivation, nickel plating, or chrome plating treatments to enhance corrosion resistance.

Xiamen Xinpeng Intelligent Manufacturing is equipped with multiple high-precision CNC lathes and Swiss-type automatic lathes (including brands like Tsugami and Star), achieving machining accuracy of ±0.005mm. We reliably deliver hardware components with strict requirements for dimensional tolerances and surface finish. The factory is certified with IATF16949 and ISO 9001 and possesses a comprehensive surface treatment supply chain. We provide one-stop customized services ranging from material selection and precision machining to surface plating based on customer drawings, meeting the stringent quality requirements of high-end brands such as Kohler and Luda.