difference between SFIC & FSIC cylinders

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There are several ways to spot differences, see Figure 1, but the easiest is to look at the face of each core. The face of both cores looks like a "figure 8".  With small format, bo...
A zero bitted Falcon SFIC core is combinated for the control key to be cut at all 4's.
The Schlage B and BD cylinder suffixes designate less small format interchangeable core (SFIC) cylinder prep for the lock. Any SFIC, 6-pin or 7-pin, can be inserted into the lock and will operate t...
Key in lever Falcon cylinders do not work in Schlage locks.  The cylinders may fit, but there are no specific tailpieces created to operate any Schlage lock. SFIC SFIC is universal so Falcon and...
   Hotel cylinder in L9000 As long as the correct cam is used (Schlage clover), a Falcon Hotel cylinder will properly function in an L9486 hotel lock.
The Schlage SFIC rim cylinder driver is part number B520-365, shown below.     Figure 1: SFIC Rim Cylinder Housing