Sargent 8256 Office & Inner En...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,725.69
$1,230.88
Sargent Sargent 8200 Series - (8256) Office & Inner Entry Lock Function Rose Trim, Heavy Duty Single Cylinder Mortise Lock, Grade 1 SGT-8256

Sargent 8256 Office & Inner Entry Mortise Lock with EcoFlex Technology - Grade 1 Heavy Duty Single Cylinder

(No reviews yet) Write a Review

Model: 8256 EA 26D
From the 8200 Series Collection
$1,725.69
$1,230.88
Selected Finish is
Selected Rose is
Selected Lever is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,725.69
$1,230.88
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Sargent 8256 Office & Inner Entry Mortise Lock with EcoFlex Technology - Grade 1 Heavy Duty Single Cylinder

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8256 mortise lock 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 lock features a 2 3/4" backset, 1 3/4" door thickness compatibility, and 3/4" latchbolt throw for reliable operation. The electromechanical version operates from 12 to 24VDC with revolutionary EcoFlex technology that reduces power consumption up to 96%, while maintaining UL 10C fire rating up to 3 hours and ANSI/BHMA A156.13 Series 1000 certification.

Professional Features & Benefits

  • Door Compatibility: Standard 2 3/4" backset with 1 3/4" door thickness and field reversible handing accommodates diverse installation requirements.
  • Exceptional Durability Rating: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for unmatched longevity in high-traffic commercial applications.
  • Revolutionary Power Efficiency: EcoFlex technology on all electromechanical functions operates from 12 to 24VDC with up to 89% energy savings for flexible system integration.
  • Heavy-Duty Construction: Grade 1 operational rating with patented design and construction delivers the strongest and most durable mortise lock performance in the industry.
  • Universal Key System Integration: Integrates with all SARGENT key systems including Degree, Signature, KESO, and XC for seamless security management.
  • Comprehensive Fire Rating: UL 10C Fire-Rated up to 3 hours with UL-cUL listing and NFPA 80 compliance for critical fire safety applications.
  • Extensive Function Availability: Available in 56 different functions including electromechanical, security and monitoring options with behavioral health trim and status indicators.
  • 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. Verify electrical requirements match available power supply. Confirm voltage (12 to 24VDC) and current capacity before proceeding.
  2. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures.
  3. Mount the unit in the specified location ensuring adequate clearance for wiring access, ventilation, and future service requirements.
  4. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application.
  5. Configure operational settings including any configurable options per application requirements.
  6. Restore power and test all functions including normal operation, alarm/alert functions, and integration with connected systems.
  7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

  • Commercial Building Security Systems
  • Educational Institution Access Control
  • Healthcare Facility Security
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties
  • Industrial Facility Access Points
  • Retail Loss Prevention Systems

Why Choose Sargent Quality?

Sargent 8256 mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles in independently verified testing. The 10-year limited warranty with 2-year electrical component coverage demonstrates Sargent's commitment to quality. Engineered for demanding commercial applications where dependable performance, fire safety compliance, and energy efficiency are essential.

Manufacturer Resources

SARGENT Full Line Catalog

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 EA 26D – Frequently Asked Questions

1) What does the Sargent 8256 office function actually do at the door?
The 8256 is Sargent's office and inner entry function, keyed on one side (single cylinder). Latchbolt is retracted by either lever unless the outside lever is locked; once locked, the key or the inside lever gets you in, and the inside lever always retracts the latch for free egress. It's the function you want on a tenant suite door, a private office, or an inner entry where staff want to lock up from inside without carrying a key.
2) Will a Sargent 8256 mortise lock fit my 1-3/4 inch commercial door?
Yes. The 8256 is built around a 2-3/4 inch backset and 1-3/4 inch door thickness, which is the standard commercial door. The latchbolt throws 3/4 inch, so it picks up a standard ANSI mortise strike. Handing is field reversible on the lock body, though you still pick Right Hand or Left Hand when ordering.
3) Is the Sargent 8256 approved for a fire rated opening?
It is. The 8256 carries UL 10C fire rating up to 3 hours with UL-cUL listing and meets NFPA 80. It's also ANSI/BHMA A156.13 Series 1000 Grade 1, so it satisfies the usual heavy duty commercial spec on a rated corridor or stair door.
4) What do I have to specify when ordering a Sargent 8256?
Four things beyond finish. Handing (right or left). Cylinder: standard cylinder, less cylinder, 70 for small format interchangeable core prep less core, or 60 for large format IC prep less core. Keying: keyed different, keyed alike, or to a key code (pick None if you ordered less cylinder). Then the trim, which is a lever choice of A, B, E, F, J, L, P or W and a rose choice of E at 3-1/16 inch, L at 3-1/2 inch, LN at 2 inch, or O at 2-3/4 inch.
5) Can I order the Sargent 8256 to work on my existing master key system?
Yes. The 8256 integrates with all SARGENT key systems, including Degree, Signature, KESO and XC. If you're keying it into an existing SFIC or LFIC system, order the 70 prep for small format or 60 prep for large format, both supplied less core, and drop your own cores in. Keyed alike, keyed different, and keying to a specific key code are all orderable.
6) What's the difference between the Sargent 8256 and a storeroom function mortise lock?
Function is the whole difference. The 8256 is office/inner entry: the outside lever can be left unlocked for business hours and locked when you want it secure. A storeroom lock keeps the outside lever locked at all times, key only, with no way to leave it unlocked. If you want the outside always locked, look at the Accentra 8805FL Grade 1 storeroom mortise or the Cal-Royal NM8080 Grade 1 storeroom lockset for 1-3/4 inch doors. For classrooms, the Cal-Royal NM8070 or Corbin Russwin ML2003 are the classroom-function equivalents.
7) Is the Sargent 8256 an electronic lock, and what do I order if I need access control on the opening?
The Sargent 8256 is a mechanical keyed lock, not electronic. For an electrified mortise opening, the BEST 45HW is a heavy duty wired electromechanical mortise lock running 12V/24V, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit, at 12/24VDC. For standalone credential access rather than wiring, the Schlage CO-100 is a Grade 1 heavy duty standalone electronic mortise lock with a keypad reader for 1-3/4 inch doors.
8) What is the closest cross-brand equivalent to the Sargent 8256 office and inner entry mortise lock?
The Cal-Royal NM8050 is the nearest match in function and grade. It is a heavy duty Grade 1 mortise lockset carrying the same Entrance/Office function as the Sargent 8256, and it is built for 1-3/4 inch doors, which is the thickness the 8256 is specified for. The Hager 3850E is a Grade 1 office-function mortise lock as well, but it is non-keyed with lever and escutcheon trim, while the Sargent 8256 is a keyed single cylinder lock. If the opening needs a key on the outside, the NM8050 is the closer swap.
9) I need a mortise lock for the same door but with a storeroom function instead of office - what should I order?
Office/inner entry lets the outside lever be locked and unlocked by key or inside thumbturn; storeroom keeps the outside lever locked at all times. For storeroom, the Accentra 8805FL is a Grade 1 storeroom mortise lock from the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset with an interchangeable core option. The NM8080 is the one to look at if you are keying into an IC core system, since the Sargent 8256 also offers small format and large format interchangeable core preps.
10) Can I use a Baldwin 6301 mortise lock body in place of a Sargent 8256?
Not without checking the door prep. The Baldwin 6301 is an entry/apartment mortise lock body built on a 2-1/2 inch backset for doors 1-3/4 inch and over, while the Sargent 8256 uses a 2-3/4 inch backset. That quarter inch changes where the cylinder and spindle land relative to the door edge, so the existing mortise pocket and face prep will not line up. Baldwin also offers the 6301LS as a lever by lever version of the same 2-1/2 inch backset body. If the pocket is already cut for a 2-3/4 inch backset ANSI mortise lock, stay with a 2-3/4 inch body.
11) Behavioral health unit - is the Sargent 8256 the right lock, or do I need anti-ligature trim?
For a ligature resistant opening the trim geometry is the deciding factor, not the lock body. The TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel for 1-3/4 inch doors, and the MRX-A-01 is the same passage function in satin stainless with arch trim. For a push/pull opening, 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. The Sargent 8256 uses conventional lever trim across its A, B, E, F, J, L, P and W lever styles.
12) I need the lock bodies now and the cylinders later. Can I buy the 8256 without a cylinder?
Yes, less cylinder is one of the four cylinder choices on the 8256. Locksmiths standardizing a building usually take this route and supply their own cylinders or IC cores. When you choose less cylinder, set keying to None.
13) Which rose size should I pick on an 8256 for a narrow stile aluminum-look door or a tight edge condition?
Rose diameter is what decides this. The LN rose is 2 inches (51mm) and the O rose is 2-3/4 inches (67mm), both tighter than the E rose at 3-1/16 inches (78mm) or the L rose at 3-1/2 inches (89mm). On a narrow face or where the rose would crowd a glass stop or an adjacent frame, the LN is the smallest footprint offered. Where you're covering old trim scars from a previous lockset, the 3-1/2 inch L rose hides the most.
14) How durable is the Sargent 8256 for a high traffic entrance?
Heavy duty, Grade 1, and tested past the usual bar: Sargent completed the UL Cycle Above and Beyond test at 16 million cycles on this design (Verification ID V584148). For a main tenant entry, a school corridor, or a hospital door that cycles all day, that's the durability argument for the 8200 body over a lighter lockset.
15) Is there a cheaper Grade 1 office function mortise lock than the Sargent 8256?
If the requirement is simply a Grade 1 office/entrance mortise lock on a 1-3/4 inch door, the Cal-Royal NM8050 is a heavy duty Grade 1 office/entrance mortise lockset with auxiliary deadlatch in the same function class. Hager's 3850E is a Grade 1 office mortise with lever and escutcheon on a 2-3/4 inch backset, but it's non-keyed, so it doesn't replace a keyed 8256. What you give up moving off the 8256 is the Sargent keyway integration (Degree, Signature, KESO, XC) and the 16 million cycle test.
16) Can I standardize a whole building on the 8200 body and still vary the function door by door?
That's the usual approach. The 8200 body is offered in 56 different functions, covering electromechanical, security and monitoring options plus behavioral health trim and status indicators, so an office door, a storeroom, and a classroom can all run the same chassis, same prep, same key system, with only the function changing. Facility teams get one door prep to train on and one spare parts pool.
17) What is a simpler mortise lock for an interior door that does not need to lock?
If the opening only needs latching, a passage function lock removes the cylinder and keying entirely. The Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Hager 3810S is a Grade 1 passage mortise lock with rose trim on a 2-3/4 inch backset, matching the backset the Sargent 8256 uses. Hager also lists the 3810E with escutcheon trim instead of rose.
18) Which mortise lock should I use for a restroom or bedroom door instead of the Sargent 8256?
Office/inner entry is a keyed function and is the wrong choice for a restroom. Use a privacy lock: the Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with a deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset for doors 1-3/4 inch to 2 inch. Both drop the outside key function that the Sargent 8256 carries as a single cylinder keyed lock.
19) Does the BEST 45HCAC substitute for a Sargent 8256?
They are both heavy duty mortise lock bodies, but the functions differ. The BEST 45HCAC is a heavy duty public entrance function lock body from the 45H Series with field reversible operation, while the Sargent 8256 is office and inner entry. BEST also lists the 45HCAINL as a heavy duty intruder function lockbody. Public entrance and intruder behave differently at the outside lever than office/inner entry does, so confirm the function the door schedule calls for before swapping.
20) Are the Emtek 3102 and similar mortise entrance locksets an alternative to the Sargent 8256?
No. The Emtek 3102 Memphis, 3104 Hamilton, 3106 Manhattan and 3019 Brisbane are all dummy function mortise entrance locksets, meaning they have no latch and no keyed operation - they are pull trim for an inactive leaf. The Sargent 8256 is a keyed single cylinder office and inner entry lock with a working latchbolt. If you need matching inactive-leaf trim beside a functioning lock, those Emtek dummies serve that role; they cannot secure the opening.
21) We are standardizing a building on one mortise platform - how do the Grade 1 heavy duty options compare on function coverage?
The Sargent 8256 sits in the 8200 Series, which covers office and inner entry in Grade 1 heavy duty with field reversible handing and integration with Sargent key systems including Degree, Signature, KESO and XC. For a single-brand facility rollout, Cal-Royal covers the same four core functions across Grade 1 heavy duty 1-3/4 inch mortise locksets: NM8050 office/entrance, NM8070 classroom, NM8080 storeroom, and NM8440 privacy. Hager's 3800 Series covers passage with the 3810S and 3810E, privacy with the 3840S, and office with the 3850E, all on a 2-3/4 inch backset.
22) What mortise lock should I use if the door is 1-5/8 inch rather than 1-3/4 inch?
The Sargent 8256 is specified for 1-3/4 inch door thickness. For thinner leaves, the Alarm Lock Trilogy electronic mortise locks cover 1-5/8 inch to 1-7/8 inch: the DL2700CR is a Grade 1 classroom function weatherproof unit, the DL3500CR is a Grade 1 classroom lock with 300 user codes, and the DL4500 is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad. Those are keypad locks rather than key-only, so confirm the opening can accept electronic credentials.
23) Can I swap the Sargent 8256 for a Schlage PC10 cylindrical lock to save on door prep?
Only on a door that is not already mortised. The Schlage PC10 is a Grade 1 non-keyed passage cylindrical lock with rose for 1-3/4 inch doors, and a cylindrical lock needs a bored 161 prep rather than the mortise pocket the Sargent 8256 requires. It is also passage rather than keyed, so it will not hold the office and inner entry function. If the frame and door are already cut for a mortise body, replacing with a mortise lock keeps the prep intact.
24) What finishes does the Sargent 8256 come in for matching existing hardware?
Sixteen, spanning the usual commercial range and some specialty coatings: 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, 10B oil rubbed dark oxidized satin bronze, 10BE and 10BL dark oxidized satin bronze variants, 14 bright nickel, 15 satin nickel, 20D dark statuary bronze, 26 bright chrome, 26D satin chrome, 32 bright stainless, 32D satin stainless, plus BSP black suede and WSP white suede powder coat. Most commercial buildings are running 26D or 32D. If your existing doors are powder coated black, BSP matches without a field respray.
25) Do I get a lever or a knob with the Sargent 8256?
Lever only. The 8256 is supplied with lever trim in eight designs (A, B, E, F, J, L, P, W) on a rose. If your building needs knobs for an aesthetic match, this isn't the lock. Levers are what most commercial and institutional specs call for on accessible openings anyway.
How fast can I get the Sargent 8256 EA 26D 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 8256 EA 26D come with a warranty?
Absolutely. The Sargent 8256 EA 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 EA 26D?
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 8256 EA 26D from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!