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Lockey KOS Add-On Key Override System

The Lockey KOS lets you add a key override system to Lockey 2000 Series and 2900 Series locks. Use with either a new Lockey keyless lock or add it to a Lockey lock that has already been installed--it just goes between the lock and the door/gate. You can use this on BOTH sides of a standard width door/gate if you also order a Lockey Thick Door Kit (Extension Kit). Otherwise, the screws, hex bolts, and spindles will not be long enough to reach all the way through. This lock override product does NOT alter the Manufacturer's Life-Time Mechanical Warranty (unlike a key override option that is built into the round flat knob on the outside lock body).

Be sure to check your door's width, because if you use this product with a Lockey 2835, for example, the total depth of both items together is increased to 2-3/4". Depending on the thickness of your door or gate, you may also need to order a Lockey Thick Door Kit (Extension Kit).

Lockey KOS Add-On Key Override System
Click image to enlarge. Source: LockeyUSA 2018 Catalog. Questions: 1-888-202-4538.


Brand-New, Authentic, Manufacturer-Authorized,
and Full Warranty GUARANTEED!  check

MSRP: $60.75

SALE:  $44.99
Save: 26% off
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Select the Options You Want:

(1) Locks with knob on outside/lever on inside have a Hold-Open slider switch to leave door unlatched. (2) Locks with lever on outside/lever on inside have a passage mode to leave door latched, but not locked. (3) Code is needed to enter (but not exit) passage mode.

Some colors are not available on all locks.

Lockey Colors
(click to enlarge)

Pay less when you buy more! 1,2

1 This table shows the starting price, not including any additional options.

2 The additional cost of options selected (if any) are not discounted.


  • ADA COMPLIANT:  yes, if mounted at proper height.
  • BOLT TYPE: deadbolt (must be locked manually); hook bolt (must be locked manually); mortised dead-locking latchbolt (locks automatically); rotating flat bar deadbolt (must be locked manually); slide-bar deadbolt (must be locked manually); spring-loaded latchbolt (locks automatically).
  • CODE LENGTH: from all to none of the numbers or letters on keypad except C and R.
  • DOOR THICKNESS: fits cabinet doors 1-1/8" to 2"; Thick Door Kit available (up to 5" thick).
  • DOOR TYPE: for interior doors that slide, like sliding doors and pocket doors; for interior or exterior doors that swing on hinges; for narrow-style commercial doors on hinges; for panic bar doors (aka crash bars/push bars) that swing on hinges.
  • FINISHES: antique brass; jet black; marine-grade satin chrome; oil rubbed bronze; satin chrome; satin nickel; white.
  • HANDING: reversible (can be installed on left or right side).
  • HANDLE: lever handle on both sides; round, flat knob on outside; thumb turn on inside.
  • INSTALLATION: surface-mounted on door or gate.
  • KEY OVERRIDE: standard.
  • KEY: comes with 2 keys.
  • KEYPAD: double-sided (on both sides); single-sided (on one side only).
  • NETWORK: none (standalone).
  • POWER REQUIRED: none, this product is 100% mechanical and uses no power.
  • PRODUCT LINE: Lockey 2000 Series; Lockey 2900 Series; Lockey P Series.
  • USAGE: commercial; residential.
  • WARRANTY: Life-Time Mechanical Warranty unless ordered with a key override built-in to the knob.
  • WEATHER: weather-resistant.


Lockey KOS Key Override System - Installation Instructions (PDF)

Life-Time Mechanical Warranty 30-Day Money Back Guarantee All Weather All Mechanical-needs no electricity
Google Product Category: 503730 - Hardware > Locks & Keys > Locks & Latches