Are Interchangeable cores compatible industry wide?

There are two types of interchangeable cores:

  • Full size interchangeable cores (FSIC)
    • Also known as Large Format Interchangeable Cored (LFIC)
    • Each manufactures FSIC cores are specific to that manufacture
    • These cores differ dimensionally
    • i.e. You can not install a Schlage FSIC into another manufacturers FSIC prep
  • Small Format Interchangeable Cores (SFIC)
    • These cores are dimensionally simliar and will install into other manufacturers SFIC prep

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