>> Search results for: S440493 NSN Search Results National Stock Number (NSN) Description 5840-99-957-1877, 5840999571877 POWER SWITCHING UNI 5840-99-549-7337 , 5840995497337 POWER SWITCHING UNI 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