Seaport Cross Arm Assembly

The Cross Arm Assembly from Seaport Digital is designed to mount to any column with a 3/8" thread. This arm allows for mounting around four heads, including two on the sides of the arm and two perpendicular to the arm. There are two 1/4"-20 mounts (one on the end and one on the arm) and two 3/8" mounts (one on the end and one on the arm). The cross arm also comes with an adapter that can turn a 1/4"-20 to 3/8", allowing for several mounting options.