5342-01-207-9643 (209-4429311)
NSN 5342-01-207-9643 (NIIN 01-207-9643) is a valve retainer in Federal Supply Class 5342, Hardware, Weapon System. Manufacturer part number 209-4429311; also referenced as 209-4429311 PIECE 12 (Portsmouth Naval Shipyard).
NIIN assigned May 1985; DEMIL A (none required); unit of issue EA (each), $632.70 gov standard price.