Sargent 4876-LC Single Cylinde...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$315.32
$197.00
Sargent 4876-LC Single Cylinder Mortise Deadbolt with 2-3/4" Backset - Less Cylinder

Sargent 4876-LC Single Cylinder Mortise Deadbolt with 2-3/4" Backset - Less Cylinder

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Model: 4876-26D-LC
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$315.32
$197.00
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Sargent 4876 Series Single Cylinder Mortise Deadbolt with 2-3/4" Backset

Professional Mortise Deadbolt Security Solution

The Sargent 4876 Series Single Cylinder Mortise Deadbolt delivers maximum security with laminated stacked steel deadbolt construction and 2-3/4" backset for standard 1-3/4" door applications. Designed for high-traffic facilities like schools and hospitals, this UL Listed deadbolt features key-operated exterior access with no inside operation for enhanced security control. The non-handed design provides installation flexibility while maintaining professional-grade performance standards.

Professional Features & Benefits

  • Door Compatibility: Standard 2-3/4" backset with 1-3/4" door thickness for common commercial door applications.
  • Heavy-Duty Construction: Laminated stacked steel deadbolt provides maximum security and durability for high-traffic institutional environments.
  • Single Cylinder Operation: Key outside operates deadbolt with no inside operation for controlled access security applications.
  • UL Listed Certification: UL and ULC Listed for code compliance and fire safety requirements in commercial installations.
  • Non-Handed Design: Universal installation reduces inventory requirements and simplifies field installation procedures.
  • 1" Latchbolt Throw: Full 1" deadbolt extension provides secure engagement with strike for reliable door security.
  • Flat Strike Configuration: Standard flat strike type ensures compatibility with common frame preparations.
  • Manufacturer Warranty: 1-year limited warranty provides confidence and protection for professional installations.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Educational Facilities
  • Healthcare Institutions
  • Commercial Office Buildings
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • High-Security Commercial Applications

Why Choose Sargent Quality?

Sargent mortise deadbolt products deliver professional-grade reliability with laminated stacked steel construction and UL Listed certification for demanding commercial applications. The 1-year limited warranty and proven performance in high-traffic facilities like schools and hospitals demonstrate the dependable security performance essential for institutional environments. Engineered for maximum security, performance, and durability where reliable access control is critical.

Product Specs

Series:
4870 Series
Product Group:
Mechanical Locks
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Subcategory:
Mortise Locks and Trim
Commercial/Residential:
Commercial
Lock Function:
Single Cylinder x Blank Mortise
Keyed Function:
Less Cylinder
Lock Type:
Deadbolt
Product Model:
4876
Product Function:
Single Cylinder x Blank Mortise
Product Category:
Mechanical Locks
Department:
Door Hardware

Sargent 4876-26D-LC – Frequently Asked Questions

1) Does the Sargent 4876 deadbolt have a thumbturn on the inside?
No. The 4876 is a single cylinder x blank function: key outside operates the bolt, and there is nothing on the inside at all. That is deliberate for controlled access, but it means nobody can throw or retract the bolt from the secure side without a key. Do not put it on a door people occupy behind, or on any required egress opening. If you need key outside and turn inside, order a different function in the 4870 Series.
2) Does the Sargent 4876-LC come with a cylinder?
It does not. The -LC suffix means less cylinder: you supply the mortise cylinder and the keying yourself. That is how facilities put these on an existing masterkey system or a proprietary keyway, and it is the reason locksmiths order it this way. Budget for a mortise cylinder with the correct length for your door thickness and the right cam for a Sargent 4870 body when you order.
3) Will a 1 inch deadbolt throw reach my existing frame strike?
The 4876 throws a full 1 inch of laminated stacked steel bolt, which is a deep engagement into the frame. If your current strike pocket was cut for a shorter throw, the bolt will bottom out before it fully extends and you will need to deepen the pocket. It ships with the flat strike type, 3-1/2 by 1-1/8 inches, which is a common frame prep.
4) Can I use a mortise deadbolt on a fire rated door opening?
The Sargent 4876 is UL and ULC Listed. Note what it does not do: with no inside operation, it cannot serve as the latching or egress hardware on the door. It is an auxiliary deadbolt used alongside a lockset or exit device, typically on a door secured after hours.
5) What is the difference between a Sargent 4876 mortise deadbolt and a Kaba Ilco 185 Series mortise lock?
Both are mortise deadbolts installed without handing. The Sargent 4876 is a single cylinder x blank mortise deadbolt, keyed from the outside with a blank plate inside and no inside operation, supplied less cylinder so the keyway is chosen separately. The Kaba Ilco 185 Series is also a deadbolt function mortise lock and is sold with no handing, single pack. If the requirement is a keyed-outside-only deadbolt with nothing to operate from the secure side, the 4876 matches that function directly.
6) I need a keypad deadbolt instead of a keyed mortise deadbolt - what mortise option covers that?
The Alarm Lock DL4500 Series is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad, for a door thickness range of 1-5/8 inch to 1-7/8 inch. The Sargent 4876 is mechanical: key outside operates the deadbolt with no inside operation, and it is furnished less cylinder. Choose the DL4500 where codes are issued and revoked without rekeying; choose the 4876 where the opening runs on the building's existing key system.
7) The opening needs a latch for daily traffic, not just a deadbolt - what should I order?
A deadbolt alone does not latch the door. For a keyed opening that latches, the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors. The Sargent 4876 is a mortise deadbolt with a 1 inch bolt throw and is often paired above a latching lockset rather than used alone on a traffic door.
8) Is a Cal-Royal NM8440 privacy lockset with deadbolt the same thing as a Sargent 4876 deadbolt?
No. The Cal-Royal NM8440 is a Grade 1 privacy/bed/bath mortise lockset with a deadbolt for 1-3/4 inch doors, so the deadbolt is thrown by an occupant from inside as part of a privacy set. The Sargent 4876 is a single cylinder x blank mortise deadbolt: key outside, blank inside, no inside operation. The two throw a bolt for opposite reasons - one gives an occupant privacy, the other secures an opening against inside release.
9) Will a Baldwin 6301 or 6310 mortise lock body work where a Sargent 4876 is specified?
They serve different openings. The Baldwin 6301 is an entry/apartment mortise lock body with a 2-1/2 inch backset for doors 1-3/4 inch and over, and the Baldwin 6310 is an entry/storeroom mortise lock body, also 2-1/2 inch backset, for doors 1-3/8 inch and over. The Sargent 4876 uses a 2-3/4 inch backset, so a door prepared for the Sargent cylinder location will not line up with a 2-1/2 inch backset Baldwin body.
10) The door needs free egress at all times - is the Sargent 4876 the wrong part?
The Sargent 4876 is keyed from the outside with no inside operation, so it is not the part for an opening that must release from inside without a key. For non-keyed free operation, the Schlage PM010 is a Grade 1 passage latch mortise lock for 1-3/4 inch doors, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, and the Hager 3810S is a 3800 Series Grade 1 passage mortise lock with rose and 2-3/4 inch backset for doors 1-3/4 inch to 2-1/2 inch.
11) Our doors are 1-5/8 inch - can I still use the Sargent 4876?
The Sargent 4876 is built around a 1-3/4 inch door thickness with a 2-3/4 inch backset. For thinner leaves in the 1-5/8 inch range, the Alarm Lock DL2700CR and DL3500CR are Grade 1 electronic classroom mortise locks rated 1-5/8 inch to 1-7/8 inch, and the DL4500 deadbolt covers the same 1-5/8 inch to 1-7/8 inch range if a deadbolt is what the opening needs.
12) Do I need to specify handing on a Sargent 4876 mortise deadbolt?
No handing to specify. The 4876 is non-handed, so one part number covers left and right hand openings, inswing or outswing. For a property manager stocking spares across a building, that means a single SKU on the shelf covers every door.
13) Should I use a mortise deadbolt or a mortise lockset with a built-in deadbolt?
A standalone mortise deadbolt like the Sargent 4876 is a separate pocket in the door doing one job: dead security, key only. Choose it when the door already has its latching hardware and you want an added lock, or where a lockset cannot be keyed the way you want. If you want one pocket doing both, a mortise lockset with an integral deadbolt covers it, such as the Cal-Royal NM8440 Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors.
14) What else could I use instead of a Sargent mortise deadbolt if I want keypad access?
The 4876 is key only, no code and no credential. For electronic deadbolt control on a mortise prep, the Alarm Lock DL4500 Series is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad, for doors 1-5/8 to 1-7/8 inches thick. For a mortise deadbolt with a mobile credential, the Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE wireless mortise lock with a 125kHz proximity reader and mobile enabled deadbolt.
15) Is there another mortise deadbolt option besides Sargent if I need a different keyway platform?
The Kaba Ilco 185 Series mortise lock is a deadbolt function and, like the Sargent 4876, is non-handed. That is the closest straight alternative among the mortise deadbolts we carry. Most of the other mortise bodies in the same class are locksets with levers or knobs, not pure deadbolts, so they are not a drop-in for a deadbolt-only pocket.
16) Can I standardize the Sargent 4876 across a school or hospital?
That is the case it is built for. Non-handed means one part number stocks every door regardless of swing, and the less cylinder configuration lets facilities key every unit into one existing masterkey system rather than managing separate key systems per door. The laminated stacked steel bolt is what carries it through high traffic institutional use.
17) For a classroom door, do I use a Sargent 4876 deadbolt or a classroom mortise lock?
Classroom function is a lockset job. The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series for 1-3/4 inch doors, and the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch, also 1-3/4 inch. The Sargent 4876 has no inside operation, which is why it is applied as auxiliary security on the opening rather than as the classroom function itself.
18) What mortise deadbolt option lets me manage access remotely instead of by key?
The Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader, mobile-enabled deadbolt with LED and Greenwich trim, right hand, with a 3 hour fire rating. The Sargent 4876 is non-handed and mechanical, keyed outside only and shipped less cylinder. The LEMD-GRW is specified with a hand; the 4876 is not, which is why it stocks as one part across openings.
19) For a behavioral health or ligature resistant opening, what replaces a standard mortise deadbolt?
The Sargent 4876 is a conventional mortise deadbolt with a keyed outside and a blank inside. Where anti-ligature trim is required, the TownSteel MRX-A-01 is a Grade 1 heavy duty ligature resistant arch trim mortise lockset in satin stainless steel with passage function for 1-3/4 inch doors, the MRX-L-01 is the Grade 1 heavy duty anti-ligature lever version, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel.
20) Do the Emtek mortise entrance locksets work as a substitute for a Sargent 4876?
No. The Emtek 3019 Brisbane, 3102 Memphis, 3104 Hamilton and 3106 Manhattan mortise entrance locksets are dummy function, meaning they are inoperative trim with no bolt to throw. The Sargent 4876 is a working deadbolt with a 1 inch throw and a flat strike, key operated from the outside.
21) What finish does the Sargent 4876 mortise deadbolt come in?
One finish: 26D, satin chromium plated over nickel. That is the satin chrome look that matches most commercial lever trim and exit device hardware already hanging in schools, hospitals and office buildings, so it blends into an existing opening without a finish mismatch.
22) I want one keyed mortise unit that both latches and deadbolts - is there an alternative to adding a 4876?
The Dormakaba E-Plex E5086 is a Grade 1 entry/egress electronic pushbutton and card lock in the E-Plex 5X86 Series with back to back mortise operation, and the Accentra NTM623-NR is a Grade 1 nexTouch Generation 3 mortise lock with a capacitive touchscreen keypad, no deadbolt, with cylinder override. The Sargent 4876 takes the opposite approach: it is a deadbolt only, non-handed, supplied less cylinder so it keys into an existing system.
How fast can I get the Sargent 4876-26D-LC 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 Sargent 4876-26D-LC come with a warranty?
Absolutely. The Sargent 4876-26D-LC 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 Sargent 4876-26D-LC?
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
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