Sargent 4876 Single Cylinder M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$495.90
$138.41
Sargent 4876 Series - Single Cylinder x Blank Mortise Deadbolt

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

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Model: SGT-4876 10
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$495.90
$138.41
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Sargent 4876 Series Single Cylinder Mortise Deadbolt with 2-3/4" Backset and 1" Throw

Professional Single Cylinder Mortise Deadbolt Solution

The Sargent 4876 Series Single Cylinder Mortise Deadbolt delivers maximum security and durability for high-traffic commercial applications. Featuring a laminated stacked steel deadbolt with 1" throw and 2-3/4" backset, this UL Listed deadbolt is engineered for 1-3/4" door thickness with non-handed installation flexibility. Ideally suited for demanding facilities like schools and hospitals where reliable security performance is essential.

Professional Features & Benefits

  • Precision Backset Dimensions: Standard 2-3/4" backset with 1" throw for reliable engagement and security performance.
  • Heavy-Duty Construction: Laminated stacked steel deadbolt provides exceptional strength and durability for high-traffic commercial applications.
  • Door Compatibility: Designed for standard 1-3/4" door thickness with non-handed configuration for versatile installation options.
  • 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 safety assurance in commercial installations.
  • Complete Installation Package: Includes 2 keys and flat strike for immediate installation readiness.
  • Manufacturer Warranty: 1-year limited warranty for added confidence and protection.

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

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

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 provides added confidence for high-traffic facility installations. Engineered for demanding commercial applications where dependable security performance is essential.

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
Keyed Function:
Single Cylinder
Lock Type:
Deadbolt
Product Model:
4876
Product Function:
Single Cylinder
Product Category:
Mechanical Locks
Department:
Door Hardware

Sargent SGT-4876 10 – Frequently Asked Questions

1) What backset and bolt throw does the Sargent 4876 deadbolt have, and will it hit my existing strike?
The 4876 runs a 2-3/4 inch backset with a 1 inch bolt throw. That backset is one of the two standard commercial backsets, so it lines up with a door already prepped 2-3/4 inches from the edge to the cylinder centerline. The 1 inch throw needs a strike pocket deep enough to take a full inch of bolt; the deadbolt ships with a flat strike, and the ordering option is the 3-1/2 x 1-1/8 inch 480 strike. If your frame is prepped for a different strike cutout, plan on refiling the lip or swapping the strike.
2) Does the Sargent 4876 deadbolt have a thumbturn on the inside?
No. The 4876 is a single cylinder deadbolt with a blank inside plate, so it is key outside only and there is no inside operation at all. That is the right choice for a storage room, a mechanical room, or a service door nobody occupies. It is the wrong choice for any door people stand behind, because they cannot retract the bolt to get out. For a door in an egress path you want a lock with free inside operation, not this one.
3) What is the closest equivalent to a Sargent 4876 mortise deadbolt from another manufacturer?
The Sargent 4876 is a single cylinder mortise deadbolt - key outside, no inside operation - built on the 4870 Series. The nearest like-for-like mechanical mortise deadbolt from another brand is the Kaba Ilco 185 Series mortise lock, which carries a deadbolt function and is supplied with no handing, matching the 4876's non-handed installation. Both are mortise-prepped bolt bodies rather than lever locksets, so a door already routed for one is the right starting point when cross-shopping the other. Confirm backset and bolt throw against your existing door prep before ordering either.
4) What should I use instead of a Sargent 4876 if I need keypad access rather than a key on a deadbolt opening?
The Sargent 4876 is key-operated only - a cylinder outside works the bolt and there is no inside operation. If the opening needs code entry on a deadbolt, the Alarm Lock DL4500 Series is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad, fitting doors 1-5/8" to 1-7/8" thick. That range overlaps the 1-3/4" doors the 4876 is built for, so the same leaf can usually take either. The tradeoff is battery and code management versus a purely mechanical bolt.
5) Can a Sargent 4876 replace a mortise lockset on a classroom or storeroom door?
No - the 4876 is a deadbolt only, with no latch and no lever or knob trim, so it cannot secure a door that must latch on closing. For a keyed classroom door, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4" doors; for a storeroom function, the Cal-Royal NM8080 is a Grade 1 mortise lockset for 1-3/4" doors with an interchangeable core option. The 4876 is commonly added above one of those as auxiliary bolt security rather than in place of it.
6) Is a mortise deadbolt like the Sargent 4876 the right thing, or should I use a mortise lockset with a deadbolt built in?
A 4876 is a deadbolt body on its own, no latch and no lever, so it is a second point of security on a door that already has a lockset or a door that only ever gets keyed shut. If you want one pocket doing both jobs, a full mortise lockset with an integral deadbolt is the other route, for instance the Cal-Royal NM8440 Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors. If you want keyed lever entry rather than a deadbolt at all, a storeroom body like the Accentra 8805FL or the Cal-Royal NM8080 covers that.
7) What comes in the box with the Sargent 4876 deadbolt, and what else do I need to order?
The 4876 arrives with the deadbolt body, a flat strike and two keys. You still choose a finish and the strike option, the standard being the 3-1/2 x 1-1/8 inch 480 strike. What you have to plan for separately is the door and frame prep: the pocket has to be routed for a 2-3/4 inch backset body and the frame cut to take a 1 inch bolt.
8) Why choose a mortise deadbolt over a surface or electronic deadbolt for a commercial door?
The 4876 is a mechanical, laminated stacked steel bolt that lives inside the door, so there is nothing to power, nothing to fail on a dead battery, and nothing on the face to pry. Access control is the tradeoff: it is key only. If you need codes or credentials on a deadbolt, the Alarm Lock DL4500 Series is a Grade 1 electronic mortise deadbolt with 2,000 user codes for 1-5/8 to 1-7/8 inch doors, and the Kaba Ilco 185 Series is another non-handed mechanical mortise deadbolt.
9) Can I use the Sargent 4876 on a school or hospital door?
Yes, and that is where it tends to land. The 4876 is a commercial-duty mortise deadbolt, UL and ULC Listed, with a laminated stacked steel bolt built for high traffic, and schools and hospitals are the applications called out for it. The caveat is function, not durability: single cylinder means no inside release, so it belongs on a closet, storage or mechanical door in those buildings, not on a classroom or patient room door where someone needs to get out.
10) Do I need to specify handing when ordering the Sargent 4876 deadbolt?
No handing to call out. The 4876 is non-handed, so one part number covers left and right hand openings, inswing or outswing. For a distributor or a procurement buyer stocking a building, that means a single line item rather than a split order, and the only variables left are finish and strike.
11) Is a Grade 1 mortise lockset with a deadbolt an alternative to installing a Sargent 4876 separately?
It can be, on a bed/bath or similar opening. The Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with a deadbolt built into the same lock body, for 1-3/4" doors - one mortise pocket instead of a lockset plus the separate 4876 bolt case. The Sargent 4876 remains the choice where the door needs a key-outside bolt independent of the latching hardware, since it is a single cylinder deadbolt with no inside operation and installs non-handed on 1-3/4" doors.
12) What looks like a substitute for a Sargent 4876 but will not work on the same door?
Two categories to rule out. Ornamental iron mortise locks such as the Marks USA 21AC and 22AC are cut for 1" doors, far thinner than the 1-3/4" wood or hollow metal door the 4876 is engineered for. Dummy trim - the Emtek 3102 Memphis and 3104 Hamilton mortise entrance locksets are dummy function - has no bolt or cylinder at all and provides no security. Neither will drop into a 4876 prep.
13) I need a deadbolt that can be locked and unlocked remotely or with a credential - what replaces a Sargent 4876?
The 4876 is mechanical, keyed outside only. Where the deadbolt has to answer to a credential or a head-end system, the Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a mobile-enabled deadbolt with LED, carrying a 3 hour fire rating. It is a full trimmed lock rather than a bare bolt case, so the door prep and the cost of ownership differ from a mechanical 4876 - plan the opening around one or the other, not a swap.
14) Does a Sargent 4876 work on an aluminum storefront door?
The 4876 is dimensioned for a 1-3/4" door with a 2-3/4" backset and a 1" throw, which suits wood and hollow metal openings rather than narrow aluminum stiles. For glass and aluminum entrances, the Kaba Ilco BR Series is a glass door bottom rail lock, and the Alarm Lock DL1300NW is a Trilogy Networx wireless electronic mortise lock with keypad made for Adams Rite deadlatches. Match the hardware to the stile you actually have before ordering.
15) If I am standardizing a school or hospital on Grade 1 mortise hardware, how does the Sargent 4876 fit alongside the locksets?
The 4876 is the auxiliary bolt in that package - UL and ULC Listed, laminated stacked steel with a 1" throw, non-handed, and offered in finishes from 32D Satin Stainless Steel to 10B Dark Oxidized Satin Bronze so it can be matched to the trim already on the doors. The latching hardware on those same openings typically comes from a Grade 1 mortise line such as the Corbin Russwin ML2000 Series classroom lockset or the Cal-Royal NM8070 Grade 1 classroom mortise lockset, both for 1-3/4" doors. Specifying the bolt and the lockset for the same door thickness keeps the prep consistent across the facility.
16) What finishes does the Sargent 4876 mortise deadbolt come in?
Twelve finishes, enough to match most existing hardware in a building: 03 bright brass clear coated, 04 satin brass clear coated, 09 bright bronze clear coated, 10 satin bronze clear coated, 10B dark oxidized satin bronze oil rubbed, 10BE dark oxidized satin bronze, 10BL dark oxidized satin bronze clear coated, 20D dark statuary bronze lacquered, 32 bright stainless, 32D satin stainless, BSP black suede powder coat and WSP white suede powder coat. For a property manager matching a fleet of doors, 32D satin stainless is the one that reads as the common commercial finish.
How fast can I get the Sargent SGT-4876 10 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 SGT-4876 10 come with a warranty?
Absolutely. The Sargent SGT-4876 10 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 SGT-4876 10?
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 Sargent SGT-4876 10 from ZenSupply?
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