Simplex 1021B

Pushbutton Lock - Best IC Core

Reviews (5) | Customer Questions (10)


Security made simple. The Kaba Simplex 1021 is a heavy-duty pushbutton lock built to withstand high traffic and tough environments. No electronics, wires, or batteries to worry about. Features auto-locking to ensure your door or gate is always locked behind you when it closes. Includes Best compatible IC key core.

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SKU: 1021B (C606-A)
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Need assistance or have questions? Call our Commercial Product Specialists at 877-439-5377 for more information and ordering assistance. We’re here to help!

  • 100% Mechanical HEAVY DUTY push button lock
  • Thousands of possible codes combinations
  • Auto-locking; can be ordered with passage mode feature in Simplex 1041 model
  • HEAVY DUTY Latchbolt with deadlocking plunger
  • Covers existing standard ASA 161 door hole
  • Fits left and right swinging doors
  • All hardware and instructions included with order
  • Low maintenance, no batteries or wires
  • Backset:  2 3/4″ included (2 3/8″ available at checkout)  How do I measure?
  • Fits nearly all hinged doors
  • Key override – furnished with a combinated (keyed up) Falcon brand 6-pin IC key core.  Includes one IC core change key, and two operating keys

GoKeyless™ is a factory trained and authorized Kaba Simplex® dealer. Sales, service, support, valid warranties. It's why thousands of clients around the world choose GoKeyless™ for their security and access control needs each year. Simplex 1021B - Combination Entry & Key Override (Best compatible IC core included) Tough-as-nails combination lock from the leader in top of the line security solutions, Kaba Ilco.  Kaba has been making high quality security products for over 100 years.  The Simplex 1000 Series is a stand-alone security lock that is highly weather resistant.  Entry is gained via a 1 to 5 digit code that is sequential.  Vandal resistant, the Simplex locks have found widespread acceptance in high-traffic commercial, institutional, and government buildings. Need this lock with a lever handle instead?  Click here

7 3/8 (H) x 3 1/8 (W) x 3 3/16 (D) in.

Door Thickness Minimum

1 3/8 in.

Door Thickness Maximum

2 1/4 in.

Door Handing


Code Length

1 to 5 Digits

Code Capacity



Weather Resistant

Door Prep

Standard 2 1/8 in. Cross-Bore, Edge Bore: 1 in., Through-Bolt Hole(s)

Door Stile Width

Minimum 4 in.


2 3/4 in.




Kaba Simplex

Handle Type


Door Opening


Lock Features

Auto Relocking

Locking Device

Cylindrical Latch

Access Type

Key, Keypad – Digits

Fire Rating

3-hour UL/ULC fire rating for A labeled doors


7.25 lbs


3 Year Manufacturer


Single Factor

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5 out of 5 stars

5 reviews

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What others are saying

  1. Excellent

    Art R Kiggins (verified owner)

    Awesome lock. Heavy duty.

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  2. Just what the client wanted.

    Fernando Valero (verified owner)

    Client needed a quick way of securing a laundry room without having to cut 56 keys per tenant.

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  3. Exactly what we needed

    Dawne Richards (verified owner)

    This wasn’t the easiest lock to install but it was well worth the struggle. It’s exactly what we needed; it looks great and so far is performing well.

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  4. Hannelore

    The basic product was great however, we were not advised that we had to obtain a cylinder to override the numbers in case of ermergency. That was a little tricky since we live in a very small community in British Columbia and these things are not easily obtained. BUT we prevailed and all is well now and our camp host is happy – no more leaving ordinary keys with the customers.

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  5. Stirling, Midland, TX

    We recently installed two keyless locks, and we love them. They work great and have eliminated the need to carry keys everywhere.

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Customer Questions & Answers

  1. Q Do you have a template for the 1021B? answer now
    Asked by Bill Caulder on September 14, 2022 3:43 PM

    Feel free to use the link below to download the template for the Simplex 1021B.

    Simplex 1000 Template

  2. A

    You would want to look at the LP1010 instead if you want a Simplex style lock compatible with a panic bar


  3. Q Do you have install instructions? answer now
    Asked by Jeff on March 19, 2021 1:24 AM

    You can find the installation manual for this model by following the link below!

    Simplex 1000 Installation

  4. Q Can this lock be changed to a passage function? answer now
    Asked by abraham on November 22, 2020 10:30 PM

    This lock does not have a passage feature but can be ordered with the hardware needed. The model for this is the Simplex 1041.

  5. A

    This is an always locking latch that whenever the door is closed it will remain locked until a code or key is used to enter but once the door closes it will be locked again. 

  6. A Yes, the spanner wrench does come with the purchase of a new lock.
  7. Q why aren't batteries needed? answer now
    Asked by Nelson on September 25, 2017 4:02 PM
    This is a mechanical lock that uses no power. Everything is done via mechanical functions. 
  8. A

    No, you cannot lock out the code with a key. You would need to go to an electronic lock with scheduling features that would allow you to lock out codes at certain times.

  9. Q Can the key knob on this model be changed to a lever handle? answer now
    Asked by Bob lessard on April 28, 2017 1:09 PM

    It cannot be changed in the field, however we offer this same lock with the lever. Check out the Simplex L1021B.

  10. Q Do you have the button reset/ change reprogram key? answer now
    Asked by steve pickett on December 23, 2016 1:22 PM

    Yes we do carry the DF-59 keys and spanner wrench to change the codes on simplex 1000 series locks. 

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