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Lockey KOS Add-On Key Override System

The Lockey KOS lets you unlock a Lockey 2000 or 2900 Series keypad lock with a metal key in addition to a combination. You may use this product with either a new lock or one that has already been installed. This product does NOT alter the Manufacturer's Life-Time Mechanical Warranty (unlike a key override option that used to be built into the round flat knob on the outside lock body and is now being phased out).

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
(MAP) check

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.

Not all colors are available on every lock.

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.


  • CATEGORY: Items to use with keyless locks (closers, guards, handles, lube, software, stops, security screws, trim plates, tumblers, etc.).
  • DOOR THICKNESS: fits cabinet doors 1-1/8" to 2"; Thick Door Kit available (up to 5" thick).
  • 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).
  • KEY: can be keyed alike; comes with 3 keys.
  • KEY CYLINDER: Schlage.
  • KEY OVERRIDE: Locks that come standard with a built-in key override..
  • NETWORK: none (standalone).
  • POWER: none, this product is mechanical.
  • PRODUCT LINE: Lockey 2000 Series; Lockey 2900 Series.
  • USAGE: business; commercial; heavy-duty commercial; hospitality; light-duty commercial; personal; rentals; residential.
  • WARRANTY: Life-Time Mechanical Warranty.
  • WAYS TO LOCK/UNLOCK: metal key.
  • WEATHER RESISTANCE: Locks that can be used exposed to weather on both sides..

Usage Information

This product should be installed between the lock and the door/gate. It can be used in either of the following situations:
  1. with a single-sided Lockey lock that has a keypad on only 1 side (like a 2210, 2835, 2900, etc)

  2. with a double-sided Lockey lock that has a keypad on BOTH sides (like a 2210DC, 2835DC, 2900DC, etc). The KOS is 5/8" thick, so if you are using a double-sided lock, you will also need to purchase 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 product has a Schlage key cylinder and comes with 3 metal keys. It can be keyed alike or keyed differently, just specify your preference in the Comments section on the Checkout screen.


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