GlareOne universal stud bolt will allow you to connect two 1/4 "and 3/8" female sockets.
The 1/4" thread will fit most cameras and camcorders.
The 3/8" thread is most often used in photographic heads.

The hexagonal shape of the middle part allows the screw to be fastened with a 13mm wrench

Dimensions:
Overall length: 20.5 mm
Length of each thread: 8 mm
Width: 13 mm