>> Search results for: SEF21 NSN Search Results National Stock Number (NSN) Description 4520-00-909-4840, 4520009094840 Cancelled -> Replaced by 4520006216669 4540-00-003-1525 , 4540000031525 HEATING ELEMENT,ELECTRICAL,NONIMMERSION TYPE 4540-00-197-5319, 4540001975319 HEATING ELEMENT,ELECTRICAL,NONIMMERSION TYPE 4520-00-891-1044 , 4520008911044 HEATING ELEMENT,ELECTRICAL,NONIM 4520-21-861-8225, 4520218618225 HEATER,SPACE,ELECTR 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