Simplex 5031

Extra Heavy-Duty Grade 1 Combination Door Lock

Reviews (1) | Customer Questions (4)


Keep it simple. The Simplex 5031 hits the top of the charts for security and reliability with easy keyless access. This extra heavy duty and fully mechanical keyless lock reduces the costs and problems associated with electronic maintenance, managing keys, and labor. Features key override and meets D.O.D. (Dept. of Defense) specifications.

SKU: 5031
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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!

  • ADA compliant lock
  • 100% Mechanical push-button lock
  • Thousands of possible codes combinations
  • Change code with change tool (provided) from interior side to meet Dept. of Defense standards
  • Auto-locking; can be ordered with passage mode feature in 5051 model
  • Covers existing standard ASA 161 door hole
  • Extra Heavy Duty Latch-bolt with deadlocking plunger
  • Fits left and right swinging doors
  • All hardware and instructions included with order
  • Low maintenance, no batteries or wires
  • Fits nearly all hinged doors
  • Includes mechanical key override for emergency access
  • Backset:  2 3/4″ included (2 3/8″ available at checkout)  How do I measure?
  • 3-year manufacturer warranty

**Lock shipped standard with Schlage brand conventional cylinder for key override in 5021, 5031, and 5041 non-IC models.

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 5031 - Combination Entry (change codes from interior; meets Dept. of Defense standards) & Key Override Industrial strength 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 5000 Series is an ANSI rated Grade 1 security lock that is highly weather resistant.  Entry is gained via a 1 to 5 digit code that is sequential.  Vandal resistant, the Simplex series of PIN based locks have found widespread acceptance in high-traffic commercial, institutional, and government buildings.
Exterior Dimensions

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

Inside Dimensions

8 7/8 (H) x 3 3/16 (W) x 2 1/8 (D) in.

Door Thickness Minimum

1 3/8 in.

Door Thickness Maximum

2 1/4 in.

Door Handing


Door Stile Width

Minimum 5 in.

Door Prep

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

ANSI Rating

A156.2, Grade 1 (Best)

BHMA Rating

Grade 1 (Best)

Code Length

1 to 5 Digits

Code Capacity







Kaba Simplex

Handle Type

Lever Handle Door Locks

Door Opening


Lock Features

Auto Relocking

Locking Device

Cylindrical Latch

Access Type

Key, Keypad – Digits


2 3/4 in.


Extra heavy-duty solid cast housings, Solid cast, ADA-compliant levers

Fire Rating

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


9.25 lbs


3 Year Manufacturer


Single Factor

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What others are saying

  1. Great


    Correct application and works great

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Customer Questions & Answers

  1. Q Is this lock compatible with panic hardware? answer now
    Asked by Bryan on May 25, 2023 8:07 AM
    Answered by the admin

    Unfortunately the Simplex 5031 is not compatible with panic hardware. If the Simplex line of locks are what you're looking for, the Simplex LP1020 is exit trim compatible!

  2. Q Can this be set for dual-custody or "dual-authentication" answer now
    Asked by Jeffrey Haas on October 17, 2019 1:07 PM
    Answered by the admin

    This model does not support dual authentication as only one access code may be set at a time. 

  3. A

    You can change it daily and it takes a couple of minutes to change the code, but it will only hold a single code at a time. We would recommend that you speak with our commercial multi-family team before purchasing to ensure you are getting the best product for your needs. 

  4. Q Can I used in a pool for an apartment complex? answer now
    Asked by Sandra on August 7, 2018 4:06 PM

    Yes, this can be used on a pool gate and we would recommend that you speak with our sales department to ensure that you purchase not only the lock itself but any additional items that might be needed such as a steel or aluminum gate box that would be used with metal gates, or any gate closers. 

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