Yale® Cylinders and Keying / Security Cylinders

All Yale® locksets are available in a wide choice of cylinder and keying options:

Cylinder Types and Options:

  • Fixed Core (standard)
  • Large Format Interchangeable Core
  • Conventional Keyways
  • Patented Keyways
  • Security Cylinders (Not UL437 Certified)
  • High Security Cylinders (UL437 Certified)

Keying Options:

  • Keyed Different (KD)
  • Keyed Alike (KA)
  • Master-Keyed (MK)
  • Grand Master-Keyed (GMK)
  • Great Grand Master-Keyed (GGMK)
  • Construction Keying (CMK)

Interchangeable Cores

Yale® cylinders with interchangeable cores allow your master key systems to be flexible. With the special “Control” key any cylinder can have its core interchanged quickly. Any Yale core can be interchanged into any other Yale lock provided it has an interchangeable core. As a result, security for any given lock can be changed in a matter of minutes. Yale interchangeable core cylinders can be used throughout the entire master key system. They can be used selectively within the system along with Yale fixed core cylinders.

There are two types of interchangeable cores that are offered by Yale.

  • Large Format (LFIC) - These cores are available in both standard Yale cylinders and also Yale® KeyMark® cylinders. Note that standard Yale cylinders and Yale KeyMark cylinders cannot be keyed to the same master key system.
  • Small Format (SFIC) - These cores are only available master-keyed in Yale KeyMark cylinders.

Patented Keyway Cylinders

Yale's utility patented keyway cylinders are available by choosing Yale® KeyMark® . Yale KeyMark cylinders include mortise, rim, key-in-lever, key-in-knob, auxiliary, and interchangeable core. IC core is available in both large and small formats. All formats can be tied into one master key system.


Security / High Security Cylinders

Yale's security/high-security cylinders contain two independent locking mechanisms. The first is a traditional 6 or 7-pin tumbler mechanism with spool drivers for increased picking resistance.

The second is a 5-tumbler rotating disc mechanism with sidebar engagement. The rotating discs are spring loaded and block the bottom of the keyway. Only a specially cut key will move the discs and allow entrance of the key. This key has a special side bitting and must align all five discs perfectly before the cylinder plug will rotate to open the lock.


Yale Locks & Hardware
100 Yale Avenue
Lenoir City, TN 37771
Tel: (800) 438-1951
Website: http://www.yalelocks.com