Manfrotto 195 Adaptor Male 5/8-1/4 screw fits into a 5/8” (16mm) receiver

Avenger B143 Adaptor Bushing D.60 for Strato-Safe.

16mm female adapter.

Plugs into Super Clamp 035 for lighting fixtures or connecting 2 Super Clamps 035 allowing them to rotate. 16 mm stud with 3/8” male threads.