½ x 1 ½ inch C Clamp for Sign Stem 3/8" threaded receiver

The "C" Clamp 3/8" Thread that fits a 1/2" x 1-1/2" Dimensional Hangrail are used along with our chrome sign holder frames with threaded receivers and threaded stems. The base threads easily into any existing 3/8” stem to attach to any existing hangrail.