Lockey MC728 4-Wheel Mechanica...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$64.59
$47.68
Lockey Lockey MC728 Mechanical Combination Lock LOCMC728

Lockey MC728 4-Wheel Mechanical Combination Cabinet Lock with Key Override

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Model: MC728-S
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$64.59
$47.68
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Lockey MC728 4-Wheel Mechanical Combination Cabinet Lock with Key Override

Professional Mechanical Cabinet Security Solution

The Lockey MC728 delivers reliable mechanical combination security for cabinet applications with a 4-wheel combination system offering 10,000 possible combinations. This zinc die-cast construction lock features key override capability for emergency access and measures 56mm x 28mm for compact installation. The mechanical cam lock design includes a code changing function accessible in the unlocked position and a 10 disc barrel with shutter cap for enhanced security.

Professional Features & Benefits

  • Compact Dimensions: 56mm x 28mm size provides versatile installation options for various cabinet configurations.
  • High Security Combinations: 4-wheel combination system delivers 10,000 possible combinations for robust access control.
  • Emergency Access Override: Key override feature allows emergency access if combination code is lost or forgotten.
  • Durable Construction: Zinc die-cast construction with powder coated finish provides long-lasting performance in commercial applications.
  • User-Friendly Code Management: Code changing function accessible in unlocked position enables easy combination updates without disassembly.
  • Enhanced Security Design: 10 disc barrel with shutter cap and code finding feature provide additional security layers.
  • Complete Installation Package: Includes 2 keys and all necessary mounting hardware for immediate installation.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Cabinet Hardware
  • Product Dimension: 56mm x 28mm
  • Product Group: Cabinet Hardware
  • Product Subgroup: Cabinet Latches and Locks
  • Product Substrate: Zinc Alloy
  • Product Type: Cabinet Locks
  • Subcategory: Mechanical Cabinet Locks

Professional Applications

  • Commercial Office Furniture Security
  • Healthcare Equipment Cabinets
  • Educational Institution Storage
  • Retail Display Case Security
  • Industrial Tool and Supply Cabinets
  • Government Document Storage
  • Multi-Tenant Building Mailbox Systems

Why Choose Lockey Quality?

Lockey MC728 cabinet locks deliver professional-grade security with zinc die-cast construction and powder coated finish for demanding commercial applications. The 4-wheel combination system with 10,000 possible combinations and key override capability provides both security and emergency access reliability. Engineered for cabinet applications where dependable mechanical security is essential without electronic complexity.

Manufacturer Resources

Lockey USA Lock Catalog

Product Specs

Product Group:
Cabinet Hardware
Product Subgroup:
Cabinet Latches and Locks
Product Type:
Cabinet Locks
Subcategory:
Mechanical Cabinet Locks
Commercial/Residential:
Commercial
Product Dimension:
56mm x 28mm
Product Category:
Cabinet Hardware
Product Substrate:
Zinc Alloy
Department:
Door Hardware

Lockey MC728-S – Frequently Asked Questions

1) Will the Lockey MC728 cabinet lock still open if someone forgets the combination?
Yes. The MC728 has a key override, and it ships with 2 keys. If a code is lost, or a tenant leaves without passing it on, you open the lock with the key rather than drilling the cabinet. That override is the reason this lock works in multi-tenant mailbox banks and shared office furniture where the code holder changes.
2) How do you change the code on a Lockey MC728 combination cabinet lock?
The code changing function on the MC728 is accessed in the unlocked position, so you set a new combination without taking the lock apart or pulling it out of the cabinet door. For a property manager or MRO crew doing turnovers, that means recoding between tenants or shifts in place. It is a 4-wheel mechanical dial with 10,000 possible combinations.
3) What size hole does the Lockey MC728 cam lock need in the cabinet?
The MC728 body measures 56mm x 28mm. Those are the two numbers the manufacturer states, without axes assigned, so check them against your existing cutout before you order. It is a cam lock format, so it mounts through a prepped opening in the cabinet face and mounting hardware is included in the box.
4) Should I use a combination cabinet lock or a keyed one for shared storage cabinets?
Go combination when the people using the cabinet change often and you do not want to issue and chase keys, which is the case in tool cribs, shift-shared supply cabinets, and student storage. The MC728 covers that with a 4-wheel dial plus a key override for the manager. Go keyed when the cabinet has to sit in an existing key system: a Sargent 4142 horizontal cabinet lock uses a 6-pin brass cylinder, and the BEST 3L Series takes a 7-pin housing, so those pull into an established keying scheme in a way a dial lock cannot.
5) Is there a cabinet lock that works without wiring or batteries?
The MC728 is fully mechanical. No power, no batteries, no access control head end, so it goes in cabinets where there is no way to run wire and nobody wants a dead battery locking out a supply room. If you do want electronic control, the powered options are a different animal: the DynaLock 1410 Series is a dual voltage cabinet lock, the SDC 290 Series is a dual voltage micro electric bolt lock, and the SDC 295 Series is battery powered with a 30-user keypad.
6) How many people can I give access to with a Lockey MC728?
One code, shared. A 4-wheel mechanical dial holds a single combination, so everyone who needs in uses the same number and there is no audit of who opened it. If you need individual users tracked or separate credentials, that is an electronic lock: the SDC 295 Series programmable cabinet lock carries a 30-user keypad, and the HES KS200 is a Wiegand cabinet lock that integrates into wired access control.
7) What is the closest keyless alternative to the Lockey MC728 for a cabinet that has no power available?
The HES KS-M is a mechanical server cabinet lock carrying a Grade 1 rating, so like the MC728 it operates without wiring or batteries. The MC728 is a zinc alloy mechanical cam lock using a 4-wheel combination with 10,000 possible codes plus a key override, and measures 56mm x 28mm. Both suit cabinets where no power run exists; the HES unit is built specifically for server cabinet doors, while the MC728 is a general commercial cabinet lock for office furniture, display cases, tool cabinets and mailbox banks.
8) If I need keypad access on a cabinet instead of a combination dial, what should I use in place of the Lockey MC728?
The HES KP20 is a stand-alone keypad cabinet lock rated Grade 1, and the SDC 295 is a battery powered programmable cabinet lock with a 30-user keypad. Both take a punched code rather than the MC728's 4-wheel mechanical dial, and the SDC 295's 30-user capacity lets each person hold a separate code. The MC728 stores one combination at a time, changed in the unlocked position, and adds a key override for emergency access.
9) We key our whole facility on small format interchangeable cores. Does the Lockey MC728 work for that, or is there a better choice?
The MC728 uses a 10 disc barrel with shutter cap for its key override, so it is not a small format interchangeable core lock. For a cabinet that has to fall under an SFIC keying system, the BEST 5L Series is a coin box cabinet lock with a 7-pin SFIC core housing, and the BEST 3L Series carries a 7-pin housing in a dead-locking vertical rim mount. Sargent's KESO F1 4152 Series is a drawer cabinet lock built for integration with that security key system.
10) Can a Lockey MC728 be tied into our access control system for cabinet audit and remote release?
No. The MC728 is a mechanical cam lock; its 4-wheel combination and key override operate independently of any panel. For cabinets that need to report to or release from access control, the HES KS200 is a server cabinet lock with Wiegand integrated wired access control at Grade 1, the SDC 290 Series is a micro electric bolt lock with dual voltage operation, and the DynaLock 1410 Series is a heavy duty dual voltage cabinet lock. Those require a power run to the cabinet, which the MC728 does not.
11) Is the Lockey MC728 tough enough for a commercial cabinet, or is it a residential lock?
It is rated commercial by the manufacturer, with a zinc alloy body and a powder coated finish. Lockey lists it for office furniture, healthcare equipment cabinets, school storage, retail display cases, industrial tool and supply cabinets, government document storage, and multi-tenant mailboxes. That is daily-cycle furniture duty, not a door lock, so do not put it where a Grade 1 door lock is specified.
12) What is the difference between a 4-wheel combination cabinet lock and a keypad cabinet lock like the HES KP20?
The MC728 turns dials: 4 wheels, 10,000 combinations, no power source, and a key override as the backup. The HES KP20 is a stand-alone keypad cabinet lock. Both let you avoid handing out keys; the mechanical dial has nothing to fail electrically and nothing to maintain, while a keypad gives you push-button entry. If the cabinet is in a location with no power and no service access, the mechanical unit is the one that keeps working.
13) Does the Lockey MC728 come with everything needed to install it?
Yes. The box has 2 keys and the mounting hardware, so a single lock goes in without a separate parts order. You supply the cutout in the cabinet face.
14) What is the simpler key-only substitute for a Lockey MC728 cabinet lock?
For a straight keyed cam lock with no combination wheels, the Sargent 4142 is a horizontal cabinet lock with a 6-pin brass cylinder, and the Sargent 1655 is a 6-pin cabinet lock with field reversible handing. The BEST 3L Series is a dead-locking cabinet lock with a 7-pin housing and vertical rim mounting. Each of these opens by key alone; the MC728 opens on a 4-wheel combination and carries the key only as an override, shipping with 2 keys and mounting hardware.
15) The cabinet doors on our job are handed left and right. Does that change which lock we order versus the Lockey MC728?
The MC728 is a mechanical cam lock in a 56mm x 28mm body, so orientation is set by how the cam is fitted rather than by ordering a hand. If a handed keyed lock is preferred, the Sargent 1655 is a 6-pin cabinet lock with field reversible handing and the Sargent KESO F1 4252 Series is a drawer lock with field reversible operation, both letting one part cover doors of either hand. The MC728 is ordered in Black or Silver finish.
16) What finishes does the Lockey MC728 come in?
Two: black and silver. The finish is powder coated over a zinc die-cast body, so if you are standardizing a floor of casework, pick the one that matches the pulls already on the doors and order both openings the same way.
17) How secure is the cylinder on the Lockey MC728 key override?
The override side uses a 10 disc barrel with a shutter cap. The shutter keeps debris and picks out of the keyway when the lock is not in use, and the disc barrel is the mechanism behind the key rather than a pin tumbler. Lockey also builds in a code finding feature on the combination side.
18) Is a coin box lock the same thing as a Lockey MC728 for a vending or laundry cabinet?
They are not interchangeable. The BEST 5L Series is a coin box cabinet lock with a 7-pin SFIC core housing, built for the coin box door and keyed into an SFIC system. The MC728 is a zinc alloy mechanical combination cam lock, 56mm x 28mm, opened by a 4-wheel code with key override, and is applied to office furniture, healthcare equipment cabinets, retail display cases, tool and supply cabinets and multi-tenant mailbox systems. Choose by whether the opening is a coin box door or a general cabinet door.
19) For a drawer rather than a hinged cabinet door, is the Lockey MC728 still the right lock?
The MC728 is a 56mm x 28mm mechanical cam lock, so it fits a drawer front that can take the barrel and swing the cam clear. Where a purpose-built drawer lock is wanted, the Sargent KESO F1 4152 Series is a cabinet lock for drawers with security system integration, and the Sargent KESO F1 4252 Series is a drawer lock with field reversible operation. The MC728 keeps the drawer keyless day to day, with 10,000 possible combinations and a key override held back for lost codes.
How fast can I get the Lockey MC728-S delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Lockey MC728-S come with a warranty?
Absolutely. The Lockey MC728-S is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Lockey MC728-S?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Lockey MC728-S from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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