One piece rod end spherical bearing with metric threads and lefthand thread option. This listing covers SA SI T/K ball joint variants and supports male or female connections. Sizes range from M5 to M50, including SI18 (M18) in the leftthread configuration. Key benefits Enables smooth, cantilevered articulation in linkages while accommodating angular misalignment. Versatile metric threaded design for straightforward installation in a wide range of equipment. Leftthread version simplifies mounting in configurations where rightthread parts would be impractical. Available in a broad size range (M5–M50) to fit diverse mechanical assemblies, improving compatibility and inventory efficiency. Sold as a single piece, providing a precise, readytoinstall rod end bearing for quick project setup. Key attributes Type: Rod end spherical bearing (ball joint) Thread: Metric threaded; left thread variant Connection options: Male and Female versions Sizes: M5, M6, M8, M10, M12, M14, M16, M18–M50 (SI18/M18 included as part of the range) Ball joint form: SA SI T/K variants Material: Not specified in the listing Configuration: 1 piece per unit Applications and use cases Robotic arms and automation linkages requiring a leftthread rod end for compact or constrained mounting. CNC machines, automation equipment, or machinery where precise pivoting and robust linkage joints are needed. Automotive or industrial equipment where spherical bearing joints with metric threads improve alignment tolerance and durability. Notes for selection and installation Confirm the required thread size (M5–M50) and ensure the leftthread variant matches your mounting orientation. Choose the appropriate ball joint style (SA SI T/K) for compatibility with your mating components. If material specification is important for your application, verify the material with the supplier before .