What is the part number for the emergency key for the mortise locks? July 02, 2015 17:34 Updated Answer The part number is A18719. SAP #71063564S Applies To45H Additional InformationThe emergency key is for privacy function only. Please note: There is not an emergency key for cylindrical, "K" Series, locksets. Related articles BEST Throw Members 40H Emergency Key Kit What are the part numbers for the alternate through bolts for the 9K to meet the Schlage door prep? 45H & 47H Mortise Locks Why won't the 1E74 cylinder work in the H or HJ function?