>> Search results for: 642AS0440 NSN Search Results National Stock Number (NSN) Description 4820-01-613-5250, 4820016135250 VALVE,CHECK 1336-01-201-3937 , 1336012013937 EXERCISE SECTION,GUIDED MISSILE 1 Related Inventory Search You can use this search box to continue searching. Search parameters can include any combination of characteristics, specifications, description, partial part numbers, NSN or other stocking number. Special characters are not needed and are automatically stripped before searching. Do you sell this part? Become part of our growing pool of certified suppliers. Send Information