This is a standard Garelick 75402:01 vessel side mount for a the table leg / grill stanchions. This comes with a 6 x 5 aluminum backing plate, four (4) stainless 1/4-20 x 2" fasteners, 4 stainless washers, and 4 ny-lock nuts.
This is all that is needed for the Yamaha 190/195 Series boats when installing on the transom.