>> Search results for: 6420V NSN Search Results National Stock Number (NSN) Description 4240-01-250-0774, 4240012500774 CARTRIDGE,RESPIRATOR,AIR FILTERI 4240-01-250-0775 , 4240012500775 CARTRIDGE,RESPIRATOR,AIR FILTERI 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