ProMaster Short Adapter Spigot 3/8"-16 Male to 1/4"-20 Male
Converts a 3/8"-16 female port to 1/4"-20 male, or a 1/4""-20 female port to 3/8"-16 male.
This adapter is made of premium brass and has a 16mm hex nut in the center section, making it easy to attach and remove.