>> Search results for: B31257 NSN Search Results National Stock Number (NSN) Description 4140-01-599-2161, 4140015992161 FAN,TUBEAXIAL 4820-00-640-1285 , 4820006401285 Cancelled -> Replaced by 4820005911274 4820-00-752-9402, 4820007529402 Cancelled -> Replaced by 4820007816927 1 Related Inventory BB312-5-7Condition NECORE BOLT Readily AvailableAdd to RFQ 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