rim/mortise interchangable core

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Answer
The Schlage small format interchangeable core rim cylinders 80-329, 80-159, 80-116, and 08-129 can accept 6 pin and 7 pin small format cores.
Rim cylinder housing only for FSIC is part number 20-079.
Rim cylinder housing only for SFIC is part number 80-129.
The "C" indicates small format IC core, which is the only core style Falcon products.  The C987 will be provided less core unless -6, or -7 suffix is specified (6 or 7 pin core) Example:...
This only applies to the full size interchangeable cores.  The SFIC mortise cylinders have part numbers for housings with construction cores (Disposable and Keyed).  Simply add (-ICX) to the end o...
Yes. Both Schlage and Falcon SFIC mortise housings will accept 6 and 7 pin cores with no additional parts.
The "500" Series trim in general (510L, 511L, 512's, & 513K) will work with all 25 series devices and are not device specific.
See descriptions for the 09-992 thru 09-997 parts kits for modular mortise cylinders.  The 09-998 is a kit for a rim cylinder.