29mm Panel Socket Housing and Nut for DC 5521 Barrel Plug Connections

Flange Dimensions: 36mm x 2.5mm
Threaded Barrel: 29mm Diameter (M29x3)
Inner Diameter: 12.1mm through flange, then clean step to 20mm bore through thread barrel.

Use a 12mm barrel plug connector like this in the center. https://www.amazon.com/dp/B09H5L3KN5

Two versions, different lengths:
27.5mm length
18.5mm length