The Short Double-Male Round Spigot from Impact has a 5/8" diameter and is made of brass. It fits 5/8" receivers and can be used as a replacement for the adapters that come included with many swivel umbrella adapters. The spigot's 1/4"-20 and 3/8"-16 male threads make it compatible with grip gear such as conversion adapters, umbrella and swivel adapters, and any mounting accessories with 1/4"-20 or 3/8"-16 female threading needing a small stud. A hole in the center of the stud is handy for tightening down the adapter with tools like a screwdriver.