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Lockey KOS Add-On Key Override System

The Lockey KOS lets you use a metal key in addition to a combination to unlock a Lockey 2000 Series keypad lock.
  • It will work 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 built-in key override option that is in the round flat knob on the outside lock body. (This option is not recommended and is being phased out.)
  • This product is NOT compatible with Lockey 2900 Series locks. It is too wide to fit on a narrow stile door and the product will extend over the edge of the door frame slightly.

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:

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.


  • ACCESSORIES: items to use with keyless locks (closers, guards, handles, lube, software, stops, security screws, trim plates, etc.).
  • DOOR THICKNESS: fits cabinet doors 1-1/8" to 2"; Thick Door Kit available (up to 5" thick).
  • FINISHES: antique brass; jet black; oil rubbed bronze; satin chrome; satin chrome marine-grade; satin nickel; white.
  • KEY: can be keyed alike; comes with 3 keys.
  • KEY CYLINDER: Schlage.
  • KEY OVERRIDE: Locks that come standard with a built-in key override for a metal key to provide an additional way to open..
  • NETWORK: none (standalone).
  • POWER: none, this product is mechanical.
  • PRODUCT LINE: Lockey 2000 Series.
  • WARRANTY: Life-Time Mechanical Warranty.
  • WAYS TO LOCK/UNLOCK: unlocks by using either a metal key OR a keypad.
  • WEATHER RESISTANCE: Locks that can be exposed to the weather on both the outside and the inside..

Usage Information

This product is designed to be installed between the lock and the door/gate. It can be used:
  1. with a single-sided Lockey 2000 Series lock (like a 2210, 2835, etc.) that has a keypad on only 1 side
  2. with a double-sided Lockey 2000 Series lock (like a 2210DC, 2835DC, etc.) that has a keypad on BOTH sides.
The KOS is 5/8" thick, so if you are using a double-sided lock, you may also need to purchase a Lockey Thick Door Kit (Extension Kit) if the thickness of your door plus the thickness of the KOS is more than the maximum specified for your lock. This is generally 2" but be sure to check the specs on the lock detail page to be sure. 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. If you want these keyed alike, be sure to add Lockey Key-Alike Service to your order.


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