Shakespeare 4720 Rail Mount 7/8in - 1 1/4in Railing Stainless Steel 1in 14 Thread

Style 4720
Economy rail mount
This mount comes with nylon adapters to fit 7/8in, 1in and 1«in vertical or horizontal, square or round rails. For use with standard 1in-14 thread antennas.
Can also be mounted to flat surfaces.
Standard 1in-14 thread.(male)