Medeco 11C63 Maxum Commercial ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$461.00
$317.00
Medeco 11C63 Maxum Commercial Double Cylinder Deadbolt, 6-Pinned, DL Keyway, Captive Key, M4 High Security

Medeco 11C63 Maxum Commercial Double Cylinder Deadbolt, 6-Pinned, DL Keyway, Captive Key, M4 High Security

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Model: MED-11C631T-24-DLT
$461.00
$317.00
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$461.00
$317.00
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Medeco 11C63 Maxum Commercial Double Cylinder Deadbolt — 6-Pinned, DL Keyway, Captive Key, M4 High Security

The Medeco 11C63 Maxum Commercial Double Cylinder Deadbolt delivers uncompromising high-security performance for demanding commercial and institutional applications. Built with solid brass construction and drill-resistant pins, this ANSI/BHMA A156.36 Grade 1 and UL 437 Listed deadbolt fits doors 1-3/8" to 2-1/2" thick and requires a 2-1/8" crossbore and 1" edge bore (ANSI A115.13). Powered by Medeco 4 (M4) cylinder technology with a 6-pinned DL keyway and captive key configuration, it provides robust protection against forced entry, picking, bumping, and unauthorized key duplication.

Key Features

  • Door Thickness Compatibility: Fits doors 1-3/8" to 2-1/2" thick, accommodating a wide range of commercial and institutional door constructions.
  • Bore Preparation Requirements: Requires a 2-1/8" crossbore and 1" edge bore per ANSI A115.13 for precise, code-compliant installation.
  • Solid Brass Construction: Solid brass body with strategically placed drill-resistant pins provides exceptional resistance to physical attack and forced entry.
  • Medeco 4 (M4) Cylinder Technology: Features patent-pending key control to prevent unauthorized key duplication, movable key elements to resist 3D printing, and sidebars with shuttle lift pin mechanisms to resist bumping and picking.
  • Double Cylinder with Captive Key: Double cylinder deadbolt configuration with captive key option adds interior key control; captive thumbturn allows fast conversion between single and double-cylinder functionality.
  • 6-Pinned DL Keyway: Six-pin cylinder with DL keyway delivers an expanded key combination matrix for enhanced key control in master key systems.
  • Master Key System Compatibility: Compatible with M4, M4 BiLevel, and M4 CLIQ master key systems for flexible, scalable access control across facilities.
  • Pick-Proof and Drill-Resistant: Virtually pick-proof and drill-resistant design engineered to defeat covert attack methods including picking, bumping, and drilling.

Certifications & Compliance

  • ANSI/BHMA A156.36 Grade 1
  • UL 437 Listed for High-Security Applications

Technical Specifications

  • Series: Maxum® Commercial Deadbolt
  • Cylinder Technology: Medeco 4 (M4)
  • Pinning: 6-Pin
  • Keyway: DL Keyway
  • Cylinder Format: Fixed Cylinder
  • 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 Restaurants
  • Apartments and Condominiums
  • Government and Municipal Buildings
  • Any Application Requiring High-Security, Tamper-Resistant Deadbolt Protection

Why Medeco?

Medeco Maxum deadbolt products are engineered with solid brass construction, drill-resistant pins, and proprietary M4 cylinder technology that resists picking, bumping, 3D-printed key attacks, and unauthorized key duplication. Certified to ANSI/BHMA A156.36 Grade 1 and UL 437 standards, the Maxum series represents the highest level of mechanical deadbolt security available for commercial, institutional, and high-value residential applications where dependable, covert-attack-resistant performance is non-negotiable.

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:
Double Cylinder
Lock Function:
Deadbolt
Product Attribute:
Deadbolts
Tags:
medeco deadbolt, medeco 4 maxum deadbolt, double cylinder deadbolt, medeco maxum deadbolt lock, high security deadbolt,ul 437 rated deadbolt, medeco m4 deadbolt
Product Model:
11C63
Product Function:
Double Cylinder
Cylinder Classification:
6 - Pinned
Keyway Options:
DL Keyway
Product Category:
Mechanical Locks
Department:
Door Hardware

Medeco MED-11C631T-24-DLT – Frequently Asked Questions

1) Do I need to pick a backset for the Medeco 11C63 deadbolt, and which one?
Backset is an order choice on the 11C63, not a fixed dimension. Options are 2-3/8 inch or 2-3/4 inch, each available with a 1 inch faceplate, a 1-1/8 inch faceplate, or drive-in (no faceplate). Measure from the door edge to the center of the crossbore on the door you're replacing and match it. 2-3/8 inch is the common residential-depth bore, 2-3/4 inch the usual commercial one. There's also a Less Bolt Assembly option if you're keeping the existing bolt and only swapping the cylinder side.
2) What is a double cylinder deadbolt and should I use one instead of a thumbturn?
A double cylinder deadbolt takes a key on both sides, with no thumbturn to throw from inside. That's why it's specified on glass doors and doors with sidelites or panels a hand could reach through, since breaking the glass gets an intruder nothing without a key. The tradeoff is egress: some jurisdictions restrict keyed-both-sides bolts on doors in an occupant's path of exit. The 11C63 covers this with a captive key option that lets you convert between double-cylinder and single-cylinder operation. If you want a key outside and a turn inside from the start, look at a cylinder-by-thumbturn Grade 1 deadbolt such as the Dexter DB1000 single cylinder.
3) Can I get the Medeco 11C63 keyed alike with the rest of my building?
Yes. Keying is a required selection at order: keyed different, keyed alike, or to a specific key code you supply. For a building already on Medeco, give the key code and the new bolts drop straight into your existing system. The 11C63 uses a 6-pin DL keyway, and it works within M4, M4 BiLevel, and M4 CLIQ master key systems, so it can sit under an existing master or grand master rather than living as a one-off.
4) What is the closest Grade 1 double cylinder deadbolt to the Medeco 11C63 Maxum for a 1-3/4 inch commercial door?
The Medeco 11C63 Maxum is a Grade 1 double cylinder deadbolt with a 6-pin DL keyway on Medeco M4 cylinders, fitting doors 1-3/8 inch to 2-1/2 inch. The closest Grade 1 double cylinder peers are the Design Hardware D1 Series double cylinder deadbolt, rated Grade 1 extra heavy duty for 1-3/4 inch doors, and the Dexter DB1000 Series double cylinder deadbolt, Grade 1 for doors 1-3/8 inch to 1-7/8 inch. Both give you key operation on both faces at Grade 1; the 11C63 differs in carrying a UL 437 listed M4 high-security cylinder with restricted DL keying, while the D1 and DB1000 use conventional cylinders. For doors thicker than 1-7/8 inch, the 11C63 covers the range those two do not.
5) I need a double cylinder deadbolt but not high-security keying - what are the alternatives to the Medeco 11C63?
The Medeco 11C63 Maxum pairs its double cylinder function with a 6-pin DL keyway on M4 cylinders and a UL 437 listing, which is what drives the restricted keying. If the opening only needs key-both-sides operation on a conventional keyway, the Hager 3214 is a double cylinder deadbolt with a Schlage C keyway for doors 1-3/8 inch to 1-3/4 inch, and the Delaney LU Series double cylinder deadbolt is a Grade 2 unit in stainless steel US32D finish. The Deltana 7312KA2 is a Grade 3 double cylinder deadbolt covering 1-3/8 inch to 2 inch doors. All three key from both faces like the 11C63; none carry the M4 cylinder platform or the UL 437 listing.
6) The building code will not allow a key on the inside - what deadbolt should I use instead of the Medeco 11C63?
The 11C63 Maxum is a double cylinder deadbolt, keyed on both faces, which many egress paths will not accept. For a thumbturn inside, the Dexter DB1000 Series single cylinder deadbolt is Grade 1 cylinder x thumbturn for doors 1-3/8 inch to 1-7/8 inch, the Falcon D111 is a Grade 1 heavy duty cylinder x thumbturn with adjustable backset, and the Accentra D111 is a Grade 1 cylinder x thumbturn with a 2-3/8 inch backset for doors 1-3/8 inch to 1-3/4 inch. Where the thumbturn also has to meet accessibility requirements, the Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn for 1-3/8 inch to 1-3/4 inch doors.
7) My door is 2-1/4 inches thick - will the Medeco 11C63 work, and what else fits that thickness?
Yes. The Medeco 11C63 Maxum fits doors 1-3/8 inch to 2-1/2 inch thick with a standard 2-1/8 inch crossbore and 1 inch edge bore per ANSI A115.13, so a 2-1/4 inch door is inside its range. Among the Grade 1 alternatives, the Corbin Russwin DL3011 cylindrical deadlock covers 1-3/4 inch to 2-1/4 inch, though it is a cylinder x blank plate deadlock rather than keyed on both faces. The Design Hardware D1 Series double cylinder is listed for 1-3/4 inch doors and the Dexter DB1000 double cylinder tops out at 1-7/8 inch, so neither reaches 2-1/4 inch.
8) We key our facility on small format interchangeable cores - is the Medeco 11C63 the right deadbolt for us?
The Medeco 11C63 Maxum uses a fixed cylinder with a 6-pin DL keyway on the M4 platform, and works with M4, M4 BiLevel and M4 CLIQ master key systems. It is not an interchangeable core deadbolt. For an SFIC facility, the Arrow E61 is a Grade 2 single cylinder deadlock supplied with SFIC prep less core for doors 1-3/8 inch to 1-3/4 inch, the Deltana CL200LAIC is a Grade 2 single deadbolt with interchangeable core prep on a 2-3/4 inch backset, and the Delaney LM Series is a Grade 1 single cylinder less core deadbolt in dull chrome US26D. Each takes your existing core; the 11C63 is the choice when you want the M4 keying itself.
9) Which deadbolt should I specify instead of the Medeco 11C63 on a fire rated opening?
The Medeco 11C63 Maxum is certified to ANSI/BHMA A156.36 Grade 1 and UL 437, which are strength and high-security attack standards. Where the schedule calls for a fire rating on the deadbolt itself, the Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch, and the Hager 3118 is a Grade 1 classroom deadbolt with a 6-pin Schlage C cylinder and a fire rating, for doors 1-3/8 inch to 1-3/4 inch. Both are cylinder x thumbturn rather than keyed on both faces, so confirm the function the opening needs before swapping.
10) Why can't tenants copy Medeco M4 keys at a hardware store?
The M4 cylinder in the Maxum deadbolt uses patent-pending key control, so blanks aren't sold across the counter and a hardware store cannot cut one. The key elements also move, which defeats copying a key from a photo or a 3D print. For a property manager that's the whole point: when a unit turns over you know how many keys exist, because none were made without your authorization. The cylinder also uses sidebars with shuttle lift pins to resist picking and bumping, and the brass body carries drill-resistant pins.
11) How is the Medeco Maxum different from a Grade 2 commercial deadbolt like the Hager 3214?
They answer different threats. The Hager 3214 is a Grade 2 double cylinder deadbolt on a Schlage C keyway fitting 1-3/8 to 1-3/4 inch doors, and a Schlage C key is duplicated anywhere. The Medeco 11C63 Maxum is Grade 1, UL 437 Listed, on a restricted 6-pin DL keyway with M4 key control, and spans 1-3/8 to 2-1/2 inch doors. Buy the Hager where you need a working commercial bolt and key control is not the issue. Buy the Medeco where the loss from a copied key, a picked cylinder, or a drilled plug is what you're actually protecting against.
12) Can I order the Medeco 11C63 unpinned so my locksmith can key it in-house?
Yes. Pinning is a selection: fully pinned from the factory, sub-assembled, or sub-assembled with no slider. A locksmith or an in-house shop running its own Medeco system takes the sub-assembled version and pins it to the existing bitting. If nobody on site is set up to pin Medeco, order it pinned and specify the keying instead.
13) Our building is on older Medeco M3 or BiLevel keys, not M4. Is that a problem?
No. Besides M4, the 11C63 Maxum is orderable in BiLevel and M3 technology, so a facility still running an M3 system can add deadbolts that key into what's already there rather than starting a second system. Specify the technology at order and give the key code. Moving to M4 across the whole site is a separate decision, and a mixed order lets you do it door by door.
14) I only need to replace the cylinder side, not the whole bolt. Can I order it that way?
Yes. There's a Less Bolt Assembly option on the 11C63, which ships the deadbolt without the latch assembly for cases where the bolt in the door is sound and only the cylinder work is being changed. That's the retrofit path when you're upgrading an existing bored opening to M4 key control without touching the bolt or the strike.
15) Is a high security deadbolt like the Medeco Maxum overkill for an apartment building?
It depends on what turnover costs you. On a multi-family building the real exposure is keys walking off with former tenants, and the M4 key control on the 11C63 means those keys can't be quietly duplicated. Where that isn't the concern, a Grade 1 double cylinder deadbolt without restricted keying does the mechanical job for less specification work: the Design Hardware D1 Series is Grade 1 extra heavy duty double cylinder for 1-3/4 inch doors, and the Dexter DB1000 double cylinder is Grade 1 for 1-3/8 to 1-7/8 inch. Neither carries a UL 437 cylinder listing.
16) What is a lower-cost Grade 2 or Grade 3 substitute for the Medeco 11C63 Maxum deadbolt?
The Medeco 11C63 Maxum is Grade 1 heavy duty. Stepping down the grade, the Dexter DB2000 Series double cylinder deadbolt is Grade 2 for doors 1-3/8 inch to 1-3/4 inch, the Delaney LU Series double cylinder is Grade 2, and the Callan Model 210S is a Grade 3 double cylinder deadbolt. All three keep the key-both-sides function of the 11C63. What changes is the cycle and strength grade and the cylinder platform - none of them carry the M4 6-pin DL keying or the UL 437 listing, so they will not join a Medeco master key system.
17) What looks like an alternative to the Medeco 11C63 deadbolt but will not actually replace it?
Several deadbolt-named items are not complete bored deadbolts. The Baldwin Reserve 8BR0618001 is a deadbolt spacer, a double cylinder accessory rather than a lock. The BEST 8T is a T Series tubular deadbolt tube component, not a finished deadbolt. The Arrow 460 is a mortise lock strike for latchbolt and deadbolt functions with a straight lip, so it is door frame hardware. The Arrow E60 is a Grade 2 exit deadlock that is non-keyed, blank plate by thumbturn, which cannot be keyed from either face the way the 11C63 double cylinder is. The Medeco 11C63 Maxum is a complete bored double cylinder deadbolt with bolt assembly options in 2-3/8 inch and 2-3/4 inch backsets.
18) Should I use the Medeco 11C63 or an electronic deadbolt for a multifamily property?
The Medeco 11C63 Maxum is a mechanical Grade 1 double cylinder deadbolt keyed on both faces, which suits apartments and condominiums where a keyed master system across the property is the goal - it runs on M4, M4 BiLevel and M4 CLIQ systems. If credentials rather than keys are the plan, the Dormakaba Nova-D is an RFID multihousing smart electronic deadbolt and the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override. The Codelocks CL2200 is a medium duty electronic surface deadbolt. The mechanical unit needs no batteries or credential management; the electronic units let you change access without rekeying.
How fast can I get the Medeco MED-11C631T-24-DLT delivered?
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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 Medeco MED-11C631T-24-DLT come with a warranty?
Absolutely. The Medeco MED-11C631T-24-DLT 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 Medeco MED-11C631T-24-DLT?
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 Medeco MED-11C631T-24-DLT from ZenSupply?
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