Medeco 11C4 Maxum Commercial L...
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Medeco Medeco Maxum Commercial LFIC Single Cylinder 6-Pinned Deadbolt, Less Core, With Bolt MED-DEADBOLT-11C4

Medeco 11C4 Maxum Commercial LFIC Single Cylinder 6-Pinned Deadbolt, Less Core, With Bolt

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Model: MED-11C401-26
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Medeco Maxum 11C4 Commercial LFIC Single Cylinder 6-Pinned Deadbolt — Less Core, With Bolt

The Medeco Maxum 11C4 is a heavy-duty, ANSI/BHMA A156.36 Grade 1 and UL 437 Listed Large Format Interchangeable Core (LFIC) single cylinder deadbolt engineered for demanding commercial security applications. Built with solid-brass construction, this 6-pinned deadbolt fits doors 1 3/8" to 2 1/2" thick and is designed around a standard 2 1/8" crossbore and 1" edge bore (ANSI A115.13 prep), making it compatible with most commercial door preparations. The Maxum platform incorporates Medeco's M4 cylinder technology, delivering multi-layered protection against picking, bumping, drilling, prying, and unauthorized key duplication — including protection against 3D-printed key copies.

Key Features

  • ANSI/BHMA Grade 1 Certified: BHMA certified Grade 1 per ANSI/BHMA A156.36, meeting the highest performance standards in the commercial door hardware industry.
  • UL 437 Listed High-Security Cylinders: UL 437 Listed cylinders provide verified resistance to prying, picking, and other forms of physical attack for maximum security assurance.
  • Door Thickness Compatibility: Fits doors 1 3/8" to 2 1/2" thick with a standard 2 1/8" crossbore and 1" edge bore (ANSI A115.13 prep) for straightforward installation on most commercial doors.
  • Advanced Picking & Bumping Protection: M4 cylinders utilize cylinder side pins, a shuttle lift pin, and a movable key element to engage a sidebar that prevents the key from turning until all elements are correctly rotated and aligned, defeating bumping, picking, and related attacks.
  • Patent-Pending Key Control: Medeco 4 patent-pending key control technology protects against unauthorized key duplication, requiring a special key cutting machine and access to Medeco-specific blanks available in a variety of restriction levels.
  • Protection Against 3D-Printed Keys: A patent-pending movable element within the key deters unauthorized 3D-printed copies of keys or blanks, addressing emerging duplication threats.
  • Solid-Brass Construction with Drill Protection: Solid-brass body with strategically placed drill pins provides maximum resistance to drilling and physical forced-entry attacks.
  • Master Keying Capabilities: M4 deadbolts can be integrated into master key systems that include M4, M4 BiLevel, and M4 CLIQ keys and cylinders, supporting extremely large keying systems.
  • Available Finishes: Offered in 14 finish options including Bright Brass (05), Satin Brass (06), Antique Brass (09), Satin Brass Blackened (10), Bright Bronze (11), Satin Bronze (12), Oil Rubbed Bronze (13), Bright Nickel (18), Satin Nickel (19), Antique Nickel (20), Black (22), Dark Bronze (24), Bright Chrome (25), and Satin Chrome (26).

Certifications & Compliance

  • ANSI/BHMA A156.36 Grade 1 Certified
  • UL 437 Listed High-Security Cylinders
  • BHMA Certified — Highest Industry Standards

Technical Specifications

  • Series: Maxum® Commercial Deadbolt
  • Cylinder Technology: Medeco 4 (M4)
  • Pinning: 6-Pin
  • Keyway: Factory-specified
  • Cylinder Format: Large Format Interchangeable Core (LFIC)
  • Certification: UL 437 Listed; ANSI/BHMA A156.36 Grade 1 (M4)
  • Door Thickness: Fits doors 1-3/8" to 2-1/2" thick
  • Door Prep: Standard 2-1/8" crossbore, 1" edge bore (ANSI/BHMA A115.13)
  • Construction: Solid-brass cylinder construction with hardened steel inserts
  • Warranty: 2-year manufacturer's warranty

Typical Applications

  • Commercial Office Buildings
  • Healthcare Institutions and Hospitals
  • Educational Facilities and Schools
  • Retail Establishments and Outlets
  • Multi-Tenant Residential and Apartment Buildings
  • Restaurants and Food Service Facilities
  • Government and Municipal Buildings

Why Medeco?

Medeco Maxum deadbolts are built on a foundation of solid-brass construction, UL 437 Listed cylinders, and ANSI/BHMA A156.36 Grade 1 certification — delivering verified, multi-layered protection against drilling, picking, bumping, prying, and unauthorized key duplication. The M4 cylinder platform's sidebar mechanism and patent-pending key control technology make the Maxum 11C4 an engineered solution for commercial environments where uncompromising security and key management control are essential.

Manufacturer Resources

Medeco Product Catalog

Product Specs

Product Group:
Mechanical Locks
Series:
Maxum Series
Subcategory:
Deadbolts
Product Subgroup:
Bored Locksets
Product Type:
Deadbolts
Commercial/Residential:
Commercial
Keyed:
Yes
Grade:
Grade 1
Duty Level:
Heavy Duty
Keyed Function:
Non-Keyed
Lock Function:
Deadbolt
Product Attribute:
Deadbolts
Product Model:
11C4
Product Function:
Cylinder x Thumbturn
Product Category:
Mechanical Locks
Department:
Door Hardware

Medeco MED-11C401-26 – Frequently Asked Questions

1) Will the Medeco Maxum 11C4 deadbolt fit a standard commercial door prep?
Yes. The Maxum 11C4 drops into a standard 2-1/8 inch crossbore with a 1 inch edge bore, which is ANSI/BHMA A115.13 prep. That is the same prep most commercial doors are already bored for, so on a retrofit you are usually just pulling the old deadbolt and dropping this in without new boring. Door thickness range is 1-3/8 to 2-1/2 inches, which covers standard 1-3/4 inch commercial doors plus thicker leaves other deadbolts will not reach.
2) Does the Medeco Maxum 11C4 come with a core, or do I need to order one separately?
The 11C4 ships less core. It is a Large Format Interchangeable Core housing, 6-pinned, so you supply the LFIC core keyed into your system. The bolt is included. Practically, that means the order has two lines: the deadbolt itself and a Medeco M4 LFIC core in the keyway your facility is already on. If you already run Medeco M4 elsewhere in the building, that is the point of buying it less core, the new opening joins the existing key system instead of starting a second one.
3) What backset do I need to specify on the Medeco Maxum 11C4 deadbolt?
Backset is an order choice, 2-3/8 inch or 2-3/4 inch, and those are the two standard backsets on bored openings. Measure from the door edge to the center of the crossbore on the door you are replacing and match it. Each backset comes three ways: 1 inch faceplate, 1-1/8 inch faceplate, or drive-in with no faceplate. On a retrofit, match the faceplate to the mortise already cut in the door edge; drive-in is for edges with no faceplate mortise at all.
4) Is the Medeco Maxum 11C4 keyed on both sides or is there a thumbturn inside?
Single cylinder: key outside, thumbturn inside. That is the configuration most commercial egress doors need, since occupants can throw and retract the bolt from inside without a key. If your application calls for a key on both sides, this is not the right part, look at a double cylinder deadbolt such as the Design Hardware D1 Series or the Baldwin Reserve contemporary round or square double cylinder deadbolts.
5) Can I put the Medeco Maxum 11C4 on a master key system with the rest of my building?
Yes, through the core. M4 deadbolts fold into master key systems built with M4, M4 BiLevel, and M4 CLIQ keys and cylinders, and the platform supports very large keying systems, which is what a campus or multi-building portfolio needs. Keyway is factory specified, so the keying schedule goes in with the order. Key control is the other half of it: Medeco 4 blanks are restricted and duplication needs a specific cutting machine, so tenants and subcontractors cannot walk a key to a hardware store.
6) I have a 2 inch thick door. What deadbolt will actually fit?
The Maxum 11C4 will. Its range runs to 2-1/2 inches, which is unusually deep for a bored deadbolt. Most of the alternatives stop short: the Accentra D111 and the Dexter DB2000 are rated 1-3/8 to 1-3/4 inches, the Dexter DB1000 goes to 1-7/8 inches, and the Deltana 7312KA2 tops out at 2 inches. On thick doors, custom stiles, or doors with added cladding, thickness is usually what disqualifies a deadbolt, so check it before backset.
7) What is the closest Grade 1 single cylinder deadbolt to the Medeco Maxum 11C4 if the door only needs standard keying, not high security?
The Accentra D111 is a Grade 1 single cylinder deadbolt with a cylinder x thumbturn function and a 2-3/8 inch backset, the same function the Maxum 11C4 carries. The Maxum 11C4 is built as a Large Format Interchangeable Core deadbolt shipped less core, so the core and keying are specified separately, while the D111 comes as a conventional keyed deadbolt in the D Series. The D111 covers doors 1-3/8 inch to 1-3/4 inch thick; the Maxum 11C4 fits 1-3/8 inch to 2-1/2 inch.
8) I need an interchangeable core deadbolt but the opening does not justify high security hardware. What else takes a core?
Two interchangeable core deadbolts sit alongside the Medeco Maxum 11C4. The Deltana CL200LAIC is a Grade 2 single cylinder interchangeable core deadbolt supplied without a cylinder, with a 2-3/4 inch backset. The Arrow E61 26D IC is a Grade 2 single cylinder deadlock prepped for SFIC and shipped less core, for doors 1-3/8 inch to 1-3/4 inch. The Maxum 11C4 is Grade 1 and takes a Large Format Interchangeable Core, so it is not core-interchangeable with an SFIC system.
9) Which Grade 1 deadbolt should I use on a door that needs keyed operation from both sides instead of a thumbturn?
The Medeco Maxum 11C4 is a cylinder x thumbturn deadbolt, so it keys from the outside only. For key-both-sides, the Design Hardware D1 Series is a Grade 1 double cylinder deadbolt rated extra heavy duty for 1-3/4 inch doors, and the Dexter DB1000 is a Grade 1 double cylinder deadbolt covering 1-3/8 inch to 1-7/8 inch doors. Double cylinder deadbolts are restricted on egress doors in many jurisdictions, so confirm the code path before specifying one.
10) Can I use the Medeco Maxum 11C4 in a mortise pocket instead of a bored door prep?
No. The Maxum 11C4 is built around a standard 2-1/8 inch crossbore and 1 inch edge bore to ANSI/BHMA A115.13, which is a bored prep. For a mortise pocket, the Dormakaba D900 is a small case mortise deadbolt with a cylinder x thumbturn function, and the Emtek 2050 is a European mortise deadbolt with an integrated roller latch. The Arrow 460 is a mortise lock strike for latchbolt and deadbolt functions, not a lock body.
11) Is the Corbin Russwin DL3011 a substitute for the Medeco Maxum 11C4?
They are both Grade 1 bored deadlocks, but the function differs. The DL3011 is a cylinder x blank deadlock, meaning there is no thumbturn on the inside face, and it covers doors 1-3/4 inch to 2-1/4 inch. The Maxum 11C4 is cylinder x thumbturn and fits 1-3/8 inch to 2-1/2 inch. If the opening needs inside thumbturn release, the DL3011 will not drop in; the Corbin Russwin DL3211 is likewise a Grade 1 cylinder x blank deadlock, sized for 1-3/4 inch doors.
12) Our doors are thicker than 1-3/4 inch. Which deadbolts besides the Medeco Maxum 11C4 will fit?
The Maxum 11C4 covers 1-3/8 inch to 2-1/2 inch, the widest range among the comparable commercial deadbolts. The Corbin Russwin DL3011 handles 1-3/4 inch to 2-1/4 inch as a Grade 1 cylinder x blank deadlock. The Deltana 7312KA2 is a Grade 3 double cylinder deadbolt covering 1-3/8 inch to 2 inch. Most other Grade 1 and Grade 2 deadbolts here stop at 1-3/4 inch, including the Accentra D111 and the Design Hardware D1.
13) What is the difference between an LFIC deadbolt like the Medeco Maxum 11C4 and a standard keyed deadbolt?
An interchangeable core deadbolt lets you pull the core with a control key and swap it in seconds, no tools and no removing the lock from the door. That is what you want where turnover is constant: apartments, student housing, tenant suites, contractor access. A conventional keyed deadbolt has to be rekeyed by a locksmith with the lock disassembled. The tradeoff is the core is a separate purchase and the whole system needs a control key discipline. Comparable interchangeable core options include the Arrow E61 Grade 2 SFIC-prep deadlock and the Deltana CL200LAIC Grade 2 with a 2-3/4 inch backset, but neither carries the Grade 1 and UL 437 combination the Maxum does.
14) Is the Medeco Maxum deadbolt overkill for a standard apartment door, and what is a cheaper Grade 1 option?
For a run-of-the-mill unit door where key control is not the problem you are solving, yes, the M4 platform is more lock than the opening needs. What you are paying for on the Maxum is UL 437 cylinder attack resistance and restricted key duplication. If you only need Grade 1 mechanical performance, the Dexter DB1000 single cylinder is Grade 1 for 1-3/8 to 1-7/8 inch doors, and the Delaney LM Series is a Grade 1 single cylinder that also ships less core. Where the Maxum earns its place is exterior perimeter doors, mechanical and IT rooms, pharmacy and records storage, anywhere a copied key is the real risk.
15) Is a drive-in bolt or a faceplate bolt right for my door?
Faceplate versions have a flat plate that sits in a mortise cut into the door edge, 1 inch or 1-1/8 inch wide depending on what is already routed there. Drive-in has no plate, the bolt housing seats straight into the edge bore, which is what you want on metal doors or prefinished edges where you would rather not chisel a mortise. If you are replacing an existing deadbolt, look at the door edge first: an existing rectangular mortise means order the faceplate that matches its width, a clean round hole means drive-in.
16) What is the difference between the Medeco Maxum 11C4 and a Grade 2 commercial deadbolt like the Arrow DBX61 or Dexter DB2000?
The Maxum 11C4 is ANSI/BHMA A156.36 Grade 1 with UL 437 Listed cylinders and solid-brass construction with drill pins. The Arrow DBX61 is a Grade 2 single cylinder deadbolt in the DBX Series, and the Dexter DB2000 is a Grade 2 single cylinder deadbolt for doors 1-3/8 inch to 1-3/4 inch. All three are cylinder x thumbturn. Grade 2 deadbolts are tested to a lower cycle and strength threshold than Grade 1, and neither Grade 2 model carries the interchangeable core format the Maxum uses.
17) What deadbolt do I use on the same commercial opening if the inside must not be keyed and no cylinder is wanted at all?
The Arrow E60 is a Grade 2 exit deadlock with a blank plate x thumbturn function and no keyed cylinder, for doors 1-3/8 inch to 1-3/4 inch. The Callan Model 205S is a Grade 3 one-sided half-bore deadbolt for openings that only need the bolt operated from one face. The Medeco Maxum 11C4 is a keyed deadbolt with a cylinder outside and a thumbturn inside.
18) Is there another Grade 1 deadbolt that ships less core like the Medeco Maxum 11C4?
Yes. The Delaney LM Series is a Grade 1 single cylinder less core deadbolt with a cylinder x thumbturn function, offered in dull chrome US26D. The Maxum 11C4 also ships less core, in a Large Format Interchangeable Core format, and comes in 13 finishes including 626 satin chrome, 605 bright brass, 613 dark bronze oil-rubbed and 622 flat black. Confirm which core format your master key system uses before pairing either body with a core.
19) My apartment doors are a mix of 2-3/8 inch and 2-3/4 inch backsets. Does the Medeco Maxum 11C4 handle both, or do I need an adjustable backset deadbolt?
The Maxum 11C4 is ordered with the bolt you need: 2-3/8 inch and 2-3/4 inch backsets, each in a 1 inch faceplate, a 1-1/8 inch faceplate, or drive-in. That is a specified backset per unit rather than a field adjustment. If you would rather stock one adjustable part, the Cal-Royal ED500 is a Grade 3 single cylinder deadbolt with an adjustable backset for 1-3/8 inch to 1-3/4 inch doors, and the Brinks Raleigh E2401 is a single cylinder deadbolt with a 4-way adjustable backset.
20) We want credential or code access on the same door instead of a mechanical key. What replaces the Medeco Maxum 11C4?
Electronic deadbolts cover that opening a different way. The Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override, the Dormakaba Nova-D is an RFID multihousing smart electronic deadbolt, and the Codelocks CL2210 is an electronic mortise deadbolt. The Maxum 11C4 is a mechanical deadbolt whose access control comes from the M4 cylinder and its key control, so it feeds a key system rather than a credential system.
21) Is the BEST 8T tubular deadbolt tube a replacement bolt for the Medeco Maxum 11C4?
No. The BEST 8T is a T Series tubular deadbolt tube component, a part of a BEST deadbolt rather than a complete lock, and it is not the bolt for a Maxum. The Maxum 11C4 is supplied with its bolt, ordered as a 2-3/8 inch or 2-3/4 inch backset in a 1 inch or 1-1/8 inch faceplate or drive-in. Two other parts in the same neighborhood are also not locks: the Baldwin Reserve 8BR0618001 is a deadbolt spacer and the Arrow 460 is a mortise lock strike.
22) Will the Medeco Maxum 11C4 match the finishes on the rest of my door hardware?
Thirteen finishes are stocked on the Maxum 11C4: Bright Brass (605), Satin Brass (606), Antique Brass (609), Bright Bronze (611), Satin Bronze (612), Dark Bronze Oil-Rubbed (613), Bright Nickel (618), Satin Nickel (619), Flat Black (622), Dark Bronze (624), Bright Chrome (625), Satin Chrome (626), and Antique Nickel (20). Those are standard BHMA finish numbers, so 626 satin chrome matches the 626 on your levers and closers across brands. For a building already standardized on satin chrome or oil-rubbed bronze, the deadbolt will not be the odd one out.
23) How does the Medeco M4 cylinder actually stop bumping and picking?
The M4 cylinder adds side pins, a shuttle lift pin, and a movable element in the key itself. All of those have to rotate and align before a sidebar releases and the plug will turn, which is what defeats bump keys and picks, since neither can set the sidebar. Drilling is addressed separately with hardened steel inserts and placed drill pins in the solid-brass body. The movable key element also blocks 3D-printed key and blank copies, which conventional pin tumbler cylinders have no defense against.
24) The thumbturn needs to be easy to operate for accessibility. Is there an alternative to the Medeco Maxum 11C4?
The Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn, cylinder x thumbturn, for doors 1-3/8 inch to 1-3/4 inch. The Maxum 11C4 is a Grade 1 cylinder x thumbturn deadbolt for doors 1-3/8 inch to 2-1/2 inch, specified around high-security cylinder performance rather than turn ergonomics.
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Does the Medeco MED-11C401-26 come with a warranty?
Absolutely. The Medeco MED-11C401-26 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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