>> Search results for: RK44BZ NSN Search Results National Stock Number (NSN) Description 4820-99-831-1137, 4820998311137 VALVE,NON-RETURN 4820-99-790-1629 , 4820997901629 VALVE,CHECK 4820-99-549-0950, 4820995490950 VALVE,CHECK 4820-99-545-9675 , 4820995459675 VALVE,CHECK 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