Summary Information (click on this NSN number for detailed information: 4730-00-001-3956)
Definition:
Tube Coupling Nut, also referenced with federal logistics item name code 3859:
An internally threaded nut which has either an internal seat or shoulder and/or is designed to be used with a ferrule, to mate with the seat of an externally threaded tube fitting to form a leakproof connection. excludes nut (1), tube coupling, reducing; and nut (1), union.
