>> Search results for: HP8491BOPT030 NSN Search Results National Stock Number (NSN) Description 5985-00-138-4683, 5985001384683 Cancelled -> Replaced by 5985013980232 5985-01-184-2525 , 5985011842525 ATTENUATOR,FIXED 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