>> Search results for: 1637591C NSN Search Results National Stock Number (NSN) Description 4420-21-005-8955, 4420210058955 STEM,STOP VALVE 4420-21-005-8933 , 4420210058933 SPINDLE,STOP VALVE 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