The lock case only can be ordered by itself. Example: LM9380 lock case part number is L283-316. See current price book for part numbers or below for the service manual (part number will vary depending on function).
Service Manual: https://commercial.schlage.com/content/dam/allegion-us-2/web-documents-2/Manual/Schlage_L_Series_Service_Manual_106500.pdf
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