Large format interchangeable core driver for AL series

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Question
Answer
The lever may be missing the slot feature for the core locking lug.  Verify slot is in place.
The AL lock can not be ordered to accept any competitor full size core.  The ND lock should be used in these applications.
The ND-Series FSIC driver is part number N523-127.
Refer to Table 1 for a list of T lock tailpieces for conventional cylinders.  Table 2 shows IC tailpieces. Table 1: T lock conventional tailpieces Table 2: T lock IC tailpieces
The RU lock can accept a Schlage Full Size core, but the cylinder suffix must be specified as "J IC-SC" so the correct parts are supplied. The tailpiece will come with the lock. Example: RU581J IC-SC
The T lock can accept a Schlage Full Size core, but the cylinder suffix must be specified as "J IC-SC" so the correct parts are supplied (including the tailpiece) Example: T581J IC-SC
The B250 product line is not available in the SFIC platform.
 DESCRIPTION PART NUMBER   Conventional Core  23-030  Conventional Core less logo  23-031  Primus Core  20-740  Primus XP Core  20-740-XP  Primus Core less logo  20-741 ...
The Schlage Full Size IC core is 6 pin only.