Pentair Bulkhead Adapter Nut, Black | 274440

This is the threaded bulkhead nut used in the mini max NT & CH heaters this nut theads onto both the inlet and the outlet of the main header to attach the plumbing connectors outside diameter: 4" inside diameter: 3-1/2" inside diameter: 2-13/16" (this is the inside of the flange itself) markings: 27-4407 is molded into the plastic this is exactly the same item as the 274407 bulkhead nut just black instead of white