Zinc Die Cast Raintight Box or Fixture Support 1/2″
https://dev.nsiindustries.com/product/zinc-die-cast-raintight-box-or-fixture-support-1-2/
Use Bridgeport 1/2″ Zinc Die Cast Raintight Box or Fixture Support to support an FS box, outdoor lighting fixture, or similar device, per NEC Article 370-23 requirements. NPT threads eliminate the need for sealing rings and locknuts.