Yale 6400LN Series Monolock

Based on the design of Yale’s robust cylindrical locksets, the 6400LN Monolock continues the tradition of quality and dependability as a preassembled lock series designed to retrofit Yale Monolock as well as Corbin Russwin Unit Lock and Falcon® Retrofit Lock installations.

  • UL-cUL: UL-cUL fire-rated up to 1-1/2 hours
  • Mechanism: Heavy-gauge steel, zinc-plated, dichromated
  • Backset: 2-3/4″
  • Latchbolt: 1/2″ stainless steel throw
  • Guardbolt: Deadlocks latchbolt when door is closed; standard on all locking functions
  • Door Thickness: 1-3/4″ only
  • Lead Shielding: Available to order
  • Cylinders: Brass, 6-pin, keyed-random cylinder with two keys furnished standard, 7-pin available to order.
  • Reversibility: Handing must be specified for all functions and designs
  • Strikes: 1-1/4″ lip ANSI strike supplied; other lip lengths and strikes available to order; all reversible
  • Finishes: Available in 626 finish only
  • Warranty: 7-year mechanical

Yale 6400LN Series Monolock

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