>> Search results for: 28500021 NSN Search Results National Stock Number (NSN) Description 4820-01-201-7558, 4820012017558 PLATE,ORIFICE,VALVE 4820-01-473-0063 , 4820014730063 DISK,VALVE 4820-01-181-3638, 4820011813638 ORIFICE PLATE,VALVE 4730-01-174-9221 , 4730011749221 RESTRICTOR,FLUID FLOW 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