Simplex 5066

Extra Heavy-Duty Combination Mortise Lock


Come and go without the burden of keys. The Simplex 5066 Extra Heavy-Duty Combination Mortise Lock allows you and your employees to ditch the keys. No more waiting for someone to show up, or for a locksmith to let you in. This lock is completely weatherproof, and is preferred for high-use, and harsh environments. Mounting hardware included.

SKU: 5066
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For more information or ordering assistance, please call our Commercial Project Specialists at 877-439-5377

  • USA made in ISO 9001 Certified 150,000 square-foot factory located in Winston-Salem, NC
  • Extra heavy-duty American Steel Mortise (ASM) lock
  • ADA compliant
  • 100% mechanical combination entry with free egress
  • Satin chrome finish
  • Thousands of possible codes combinations
  • Change code with change tool (provided) from exterior side
  • Auto-locking security
  • Covers existing standard 86 mortise preps
  • Lock mechanism is two-piece 3/4″ latch
  • Fits left and right swinging doors
  • All hardware and instructions included
  • Low maintenance, no batteries or wires
  • Fits nearly all hinged doors
  • Key override:  Furnished with a 6 pin conventional Schlage cylinder with Schlage C keyway for emergency access
  • 3-year manufacturer warranty
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. Improved Convenience & Protection for Your Business 5 buttons on this lock's keypad allow you and your employees to come and go without the burden of keys. No need to wait for what can seem like forever for someone to show up with the spare, or for a locksmith to let you in. You won't have to worry about keys being left in the keyhole, or an employee dropping the keys in the parking lot, only to be picked up by someone who could ransack your place and rob you. It replaces your current mortise lock in under 25 minutes time. The sturdy levers, buttons, and housing are made from long-lasting nickel alloy. Rated Grade 1 by ANSI/BHMA, the lock is completely weatherproof, and is preferred for high-use, and harsh environments. Mounting hardware included.
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.


Mortise Lock Casing: 5 7/8 (H) x 4 1/8 (W) in., Mortise Lock Faceplate 8 (H) x 1 1/4 (W) 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

Mortise, 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


Access Type

Key, Keypad – Digits


Schlage C


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

Fire Rating

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


12 lbs


3 Year Manufacturer


Single Factor

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Customer Questions & Answers

  1. A

    The lock can be unlocked by both a PIN code or a physical key!

  2. Q Will a Sargent keyway cylinder work for this lock? answer now
    Asked by Richard on January 11, 2022 4:18 PM

    You could use a Sargent cylinder with this lock, yes. 

  3. A

    The combination can be between 1-5 digits long. Each button may only be used once. 

Send me a notification for each new answer.