David White Transit Adapter 5/8 X 11 to 3.5 X 8

David White Transit Adapter 5/8 X 11 to 3.5 X 8 David White Aluminum Adapter allows older 3-1/2" x 8 thread instruments (such as David White and Berger) to be used with modern 5/8" x 11 thread tripods  This adapter is machined from one piece of solid aluminum  Adapter consists of a Male thread wrapping around the outside of the adapter and has a diameter of 3 1/2"  Adapter has an inside Female thread with a diameter of 5/8" with 11 threads per inch that accepts most tripod core screws sold today