USED This metal conduit connector measures:
The connector is 1 1/4" wide by 13/16" high overall.
The thread has an outer diameter of 13/16", with an inner diameter of 5/8".
The open space when screwed down is 3/8" long by 1/4" wide.
One of them is missing a screw, and one is missing both screws. They are sold individually. The manufacturer and part number are unknown.