Sargent 8256-ET Office & Inner...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,799.49
$1,369.58
Sargent Sargent 8200 Series - (8256) Office & Inner Entry Lock Function Escutcheon Trim, Heavy Duty Single Cylinder Mortise Lock, Grade 1 SGT-8256-ET

Sargent 8256-ET Office & Inner Entry Mortise Lock with Heavy Duty Single Cylinder and Grade 1 Rating

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Model: 8256 LE1A 26D
From the 8200 Series Collection
$1,799.49
$1,369.58
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,799.49
$1,369.58
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Sargent 8256-ET Grade 1 Heavy Duty Single Cylinder Mortise Lock with 2 3/4" Backset

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8256-ET represents the industry benchmark for commercial mortise locks, delivering maximum security, performance, and durability with high-quality components. This Grade 1 heavy duty single cylinder mortise lock features a 2 3/4" backset, 1 3/4" door thickness compatibility, and 3/4" latchbolt throw for reliable operation. The multi-functional lock body accommodates a variety of lever and escutcheon styles while maintaining UL 10C fire rating up to 3 hours and ANSI/BHMA A156.13 Series 1000 compliance.

Professional Features & Benefits

  • Heavy-Duty Construction: Multi-functional lock body with patented design exceeds industry standards for strength and reliability in demanding commercial applications.
  • Exceptional Durability: UL Cycle Above and Beyond test completed at 16 million cycles for long-term performance in high-traffic environments.
  • Precise Dimensions: 2 3/4" backset with 1 3/4" door thickness compatibility and 3/4" latchbolt throw for reliable operation and proper fit.
  • Fire-Rated Performance: UL 10C positive pressure certified and UL-cUL Fire-Rated up to 3 hours for life safety compliance in commercial buildings.
  • Universal Key System Integration: Compatible with all SARGENT key systems including Degree, Signature, KESO, and XC for flexible security management.
  • Field Reversible Configuration: Standard 2 3/4" backset with field reversible handing reduces inventory requirements and simplifies installation.
  • EcoFlex Technology: Electromechanical versions operate from 12 to 24VDC with EcoFlex technology reducing power consumption up to 96% for energy-efficient operation.
  • Manufacturer Warranty: 10-year limited warranty with 2-year coverage on electrical components 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 1 3/4" door thickness, 2 3/4" backset, and handing as applicable to this mortise lock.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for proper mortise preparation.
  3. Prepare door and frame by drilling required holes and routing mortise cavity as specified in manufacturer instructions for lock body installation.
  4. Install all mounting hardware and secure the lock body to door and strike to frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion with 3/4" latchbolt throw.
  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 8200 Series mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles in UL testing. The 10-year limited warranty with 2-year electrical component coverage demonstrates the manufacturer's confidence in long-term performance. Engineered for demanding commercial applications where dependable security and fire safety compliance are essential.

Product Specs

Series:
8200 Series
Grade:
Grade 1
Keyed Function:
Single Cylinder
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Subcategory:
Bored Locksets
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Office/Inner Entry Lock
Product Type:
Mortise Locks
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Entrance/Office
Product Category:
Mechanical Locks
Collection:
8200 Series
Department:
Door Hardware

Sargent 8256 LE1A 26D – Frequently Asked Questions

1) What does the Sargent 8256 office/inner entry function actually do at the door?
The 8256 is an office and inner entry function: the outside lever is locked or unlocked by the key, and the inside lever always retracts the latch for free egress. It is a single cylinder lock, so there is only a keyed cylinder on the outside. If you need a door that stays locked at all times and is only opened by key from outside, that is a storeroom function instead, such as the Cal-Royal NM8080 or the Accentra 8805FL.
2) Do I have to order the Sargent 8256 handed?
No. Handing is field reversible on this lock, so one part number covers left and right hand openings and you can stock fewer SKUs across a building. You still set the handing correctly during install before hanging the trim.
3) Is the Sargent 8256-ET fire rated for a labeled door?
Yes. It is UL 10C positive pressure certified and UL-cUL fire rated up to 3 hours, and it meets ANSI/BHMA A156.13 Series 1000 as a Grade 1 lock. That covers labeled openings in stairwells, corridors, and tenant separations up to a 3 hour rating.
4) What do I have to specify when ordering a Sargent 8256-ET besides the finish?
Four things. Lever style (A, B, E, F, J, L, P or W), escutcheon trim (LE1, LS, LW1 or WT), finish, and the cylinder and keying. Cylinder choices are a standard cylinder, less cylinder, 70 for small format interchangeable core prep less core, or 60 for large format interchangeable core prep less core. Keying is keyed different, keyed alike, or to a supplied key code; pick the none option if you are ordering less cylinder.
5) Can I key the Sargent 8256 into an existing master key system?
Yes. The 8200 Series works with all Sargent key systems, including Degree, Signature, KESO and XC. If your building runs a different manufacturer's core, order the 60 (large format IC prep) or 70 (small format IC prep) option less core and drop your own core in.
6) What is the closest cross-brand equivalent to the Sargent 8256-ET office and inner entry mortise lock?
The Cal-Royal NM8050 is the nearest match in function and grade: it is a Grade 1 heavy duty mortise lockset with an Entrance/Office function, listed for 1-3/4 inch doors, which is the same door thickness the Sargent 8256-ET is built around. Both are keyed office/inner-entry mortise locks rated Grade 1. The difference is in trim and keying breadth - the 8256-ET is ordered with a choice of LE1, LS, LW1 or WT escutcheon and A, B, E, F, J, L, P or W lever, while the NM8050 is catalogued with an auxiliary deadlatch as its headline feature.
7) If the opening needs a classroom function instead of office, what mortise lock should be used?
The Sargent 8256-ET is an office/inner entry function and will not give you classroom keying behavior. For a classroom opening, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors, and the Cal-Royal NM8070 is a Grade 1 heavy duty classroom mortise lockset for the same door thickness. Both keep the mortise pocket prep you are already cutting.
8) What should I use instead of the 8256-ET on a door that must stay locked at all times from the outside?
Office/inner entry allows the lever to be left unlocked, so for a door that must always relock, go to a storeroom function. The Accentra 8805FL is a Grade 1 storeroom mortise lock from the 8800 Series, and the Cal-Royal NM8080 is a Grade 1 heavy duty storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. The Sargent 8256-ET itself can be ordered with 70 small format or 60 large format interchangeable core prep if IC keying is what you are matching.
9) Can I use a Baldwin 6301 mortise lock in place of the Sargent 8256-ET?
Not as a drop-in. The Baldwin 6301 entry/apartment mortise lock body is built on a 2-1/2 inch backset, while the Sargent 8256-ET uses a 2-3/4 inch backset, so the cylinder and spindle centers do not land in the same place in the door. The Baldwin 6301 is offered knob by knob and, as the 6301LS, lever by lever, for doors 1-3/4 inch and over.
10) Is the Sargent 8256-ET tough enough for a high traffic entry?
It is a Grade 1 heavy duty commercial mortise lock and completed UL's Cycle Above and Beyond testing at 16 million cycles. That is the level you want on office suite doors, school corridors, and multi-family common entries rather than a bored cylindrical lock.
11) Is the Sargent 8256-ET an electronic lock, and can I add access control later?
No, the 8256-ET is a mechanical key and lever lock with no electronics. If you need electrified operation on the same opening, look at a wired electromechanical mortise lock such as the BEST 45HW, which runs on 12V/24V, or the Command Access ML190 motorized mortise lock with field selectable fail safe or fail secure operation at 24VDC.
12) What is the difference between escutcheon trim and rose trim on a mortise lock like this?
The 8256-ET ships with escutcheon trim, a full plate behind the lever covering the cylinder and lever together, in LE1, LS, LW1 or WT styles. Sectional rose trim uses separate round roses for the lever and cylinder. Escutcheon hides more of the door face, which helps when you are replacing older trim or covering previous prep. Hager's 3800 Series shows the same split, with the 3810E sold with escutcheon and the 3810S with rose.
13) I need a classroom or privacy function on the same doors as my Sargent 8200 locks. What are my options?
The 8256 is office and inner entry only, so for other functions in a Grade 1 mortise you would look at a classroom lock such as the Corbin Russwin ML2003 or the Cal-Royal NM8070, both Grade 1 for 1-3/4 inch doors, or a privacy function like the Cal-Royal NM8440 with deadbolt or the Hager 3840S. Sargent's own 8200 Series carries those functions under different function numbers if you want everything on one keyway.
14) Will the Sargent 8256 latch into my existing ANSI mortise strike?
The latchbolt throws 3/4 inch on a 2-3/4 inch backset, which is the standard commercial mortise arrangement, so it lines up with a standard ANSI strike already cut into the frame. Check that the existing strike lip projection suits your frame reveal and that the pocket depth in the door matches the 8200 lock body before you commit.
15) Is there a non-keyed mortise lock I can use on the interior doors while keeping the 8256-ET on the entry doors?
Yes. The Sargent 8256-ET is a keyed single cylinder lock. For passage openings in the same run, the Schlage PM010 is a Grade 1 non-keyed 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 the Hager 3810E is a passage mortise lock with escutcheon and a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors. The Hager 3810E shares the 2-3/4 inch backset the 8256-ET uses, so the door prep carries over.
16) What is the difference between the Sargent 8256-ET and the Hager 3850E office mortise lock?
Both are office function mortise locks supplied with lever and escutcheon trim. The Sargent 8256-ET is keyed with a single cylinder and is ordered with a standard cylinder, less cylinder, or small or large format IC prep. The Hager 3850E is a non-keyed office mortise lock with lever and escutcheon on a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors. If the opening needs a key on the outside, the 3850E is not a substitute.
17) I need access control on the same door prep as the Sargent 8256-ET - what are my electronic options?
The Sargent 8256-ET is a mechanical lock with no electronic function. For electrified or standalone credential control in a mortise pocket, the BEST 45HW is a wired heavy duty electromechanical mortise lock with 12V/24V operation, the Command Access ML190 is a heavy-duty motorized mortise lock with field selectable EL/EU operation on 24VDC, and the Schlage CO-100-MS is a Grade 1 standalone electronic mortise lock with a keypad reader for 1-3/4 inch doors. Verify the trim and prep against each device's own template before cutting.
18) Which mortise lock should I specify for a behavioral health or ligature-resistant opening rather than the 8256-ET?
The 8256-ET uses conventional lever trim with escutcheon plates, which is not a ligature-resistant profile. For those rooms, the TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel, the MRX-A-01 is the same passage function with satin stainless ligature-resistant arch trim, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset described as ligature resistant and ADA compliant. All three are passage function, so pair them with a keyed lock elsewhere if the room needs securing.
19) Is a Schlage L0170 or an Emtek 3102 an alternative to the Sargent 8256-ET?
No - those are dummy trims, not working locks. The Schlage L0170 is a Grade 1 half dummy trim for 1-3/4 inch doors, and the Emtek 3102 Memphis, 3104 Hamilton and 3106 Manhattan are dummy mortise entrance locksets. They have no latch operation and no cylinder. The Sargent 8256-ET is a keyed office/inner entry lock with a 3/4 inch latchbolt throw. Order dummy trim only for the inactive leaf of a pair.
20) For a restroom or bedroom door, what replaces the 8256-ET?
Office/inner entry is a keyed function and is the wrong choice for a privacy door. The Cal-Royal NM8440 is a Grade 1 heavy duty privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Hager 3840S is a privacy mortise lock on a 2-3/4 inch backset for 1-3/4 to 2 inch doors - the same 2-3/4 inch backset the Sargent 8256-ET is prepped for.
21) What finishes can I get to match the rest of the doors in my building?
Sixteen: bright and satin brass (03, 04), bright and satin bronze (09, 10), dark oxidized satin bronze in oil rubbed, plain and clear coated (10B, 10BE, 10BL), 20D dark statuary bronze, bright and satin nickel (14, 15), bright and satin chrome (26, 26D), bright and satin stainless (32, 32D), plus black and white suede powder coat (BSP, WSP). 26D satin chrome and 32D satin stainless are the usual commercial standards.
22) Is there an installation template for prepping the door for a Sargent 8200 mortise lock?
Yes. Sargent publishes a 7800 and 8200 Series mortise lock template covering both sectional rose trims and escutcheon trims, plus a full 7800/8200 mortise lock catalog with the function and trim breakdown. Use the template to lay out the mortise pocket, cross bores and trim holes before routing.
23) What is the difference between ordering the Sargent 8256-ET and buying a BEST 45H mortise lock body?
The Sargent 8256-ET is ordered as a complete lock with escutcheon trim and lever selected at the time of order - LE1, LS, LW1 or WT escutcheon with an A, B, E, F, J, L, P or W lever. The BEST 45HCA is catalogued as a heavy duty mortise lock body on its own, in public entrance function with field reversible operation, and the 45HCAINL body carries an intruder function. Choose a body only when you already have trim on hand or are rebuilding an existing opening.
How fast can I get the Sargent 8256 LE1A 26D 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 Sargent 8256 LE1A 26D come with a warranty?
Absolutely. The Sargent 8256 LE1A 26D 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 8256 LE1A 26D?
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