SO-239 Adapter Stud: Universal Standard 3/8"x24 Thread Mount with SO-239 Connector perfectly fits for CB Mobile Antennas and other antenna types that use a 3/8"x24 Thread Stud Style Base and signal Loss and static electricity will be less with our shorter actual stud Direct Replacement: This CB Radio Antenna Mount designed to replace broken or weaker stud mounts used in a standard 1/2" bracket hole and ideal for mounting on fenders, trunks, hoods, bodies or other surfaces with narrow gaps or channels Specially for CB Antenna Mount: The 3/8 x 24 Antenna Stud Closely integrated with cb whip antennas and compatible with TRAM, Fire Stick firefly cb antenna; for Pro Trucker, Francis, Hustler, RoadPro, Browning, Wilson cb antenna and more Compact but Durable: CB Antenna Stud Mount made of pure copper nickel-plated material ensures a strong and tight connection with antenna, no more worrying about being swayed or dropped by trees, low hanging, strong winds, etc Easy Installation: The CB Radio Mount you receive will be assembled in the correct order to fit directly into any mounting surface with 1/2" (13mm) holes and are suitable for most trailers, trucks, RVS, SUVs, vans, ATVs such as Jeeps and more; Rquires an Antenna and PL259 adapter Cable to operate This SO239 Antenna Adapter with Standard 3/8" x 24 threads, desiged for any 1/2" (13mm) Mounting Hole, suitable for most vehicles such as jeep trucks, etc.