5310-01-364-5563 (7378-1)
NSN 5310-01-364-5563 (NIIN 01-364-5563) is a hexagon plain nut in Federal Supply Class 5310, Nuts And Washers — a nut, flat on top and bottom having 6 flat sides. Manufacturer part number 7378-1 (Tescom Corp, CAGE 13669); also referenced as 9560141310 (Safran Helicopter Engines).
NIIN assigned September 1992; DEMIL A (none required).