Sargent 8255-H0XX Heavy Duty S...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,141.43
$1,216.95
Sargent 8200 Series - (8255) Office or Entry Function Rose Trim, Heavy Duty Single Cylinder Mortise Lock, With Studio Collection Levers

Sargent 8255-H0XX Heavy Duty Single Cylinder Mortise Lock with Studio Collection Levers - Office/Entry Function

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Model: 8255 TR H001 26D
From the 8200 Series Collection
$2,141.43
$1,216.95
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,141.43
$1,216.95
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Sargent 8200 Series Heavy Duty Single Cylinder Mortise Lock with Studio Collection Levers - Office/Entry Function

Industry Benchmark Heavy Duty Mortise Lock Solution

The Sargent 8200 Series mortise lock delivers maximum security, performance, and durability as the industry benchmark for commercial mortise locks. This heavy duty single cylinder lock features a 2-3/4" backset, 3/4" latchbolt throw, and accommodates 1-3/4" door thickness with field reversible handing. The multi-functional lock body integrates with all Sargent key systems including Degree, Signature, KESO, and XC, while offering UL 10C fire rating up to 3 hours and ANSI/BHMA A156.13 Series 1000 Grade 1 certification.

Professional Features & Benefits

  • Precision Door Specifications: 2-3/4" backset depth with 3/4" latchbolt throw designed for 1-3/4" door thickness and field reversible handing for versatile installation.
  • Heavy-Duty Durability: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for unmatched reliability in high-traffic commercial applications.
  • EcoFlex Energy Technology: Advanced electromechanical functions create up to 89% energy savings while operating from 12 to 24VDC for efficient power management.
  • Premium Construction: Heavy duty lever-style design with patented construction exceeds independently verified testing standards for superior strength and vandal resistance.
  • Universal Key System Integration: Compatible with all Sargent key systems including Degree, Signature, KESO, and XC for comprehensive security management.
  • Multi-Functional Design: Available in 56 different functions including electromechanical, security and monitoring options with on-site function switching capability.
  • Comprehensive Fire Rating: UL 10C positive pressure fire-rated up to 3 hours with NFPA 80 compliance for critical life safety applications.
  • Manufacturer Warranty: 10-year limited warranty with 2-year coverage on electrical components for long-term protection and confidence.

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 8200 Series mortise locks deliver professional-grade reliability with heavy duty construction tested to 16 million cycles and comprehensive fire rating up to 3 hours. The 10-year limited warranty with 2-year electrical component coverage provides exceptional protection for demanding commercial applications. Engineered with patented design features and ANSI/BHMA Grade 1 certification, this lock exceeds industry standards where dependable security performance is 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/Entry
Product Type:
Mortise Locks
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Entrance/Office
Keyway Profile:
LA Keyway
Product Category:
Mechanical Locks
Collection:
8200 Series
Department:
Door Hardware

Sargent 8255 TR H001 26D – Frequently Asked Questions

1) Will the Sargent 8255 mortise lock fit a 1-3/4 inch door with a 2-3/4 inch backset?
Yes. The Sargent 8200 Series 8255 mortise lock body is built for 1-3/4 inch door thickness with a 2-3/4 inch backset, which is the standard commercial mortise prep. The latchbolt throws 3/4 inch, so it engages a standard ANSI mortise strike. If your doors are thicker or thinner than 1-3/4 inches, this is not the right body.
2) Does the 8255 office/entry function need to be ordered left or right hand?
No handing call is required. The 8255 lock body is field reversible, so one part number covers both hands and you set it on site. That makes it easy to stock a single body across a building and adapt at the opening.
3) What does the 8255 office/entry function actually do at the door?
Office/entry is the function you want on a tenant suite or office door where staff need to lock up from the inside. The outside lever is locked or unlocked by key, and the inside lever always retracts the latch for free egress. It is a single cylinder lock, so there is a cylinder on the outside only.
4) Can this Sargent mortise lock go on a fire rated door?
Yes. The 8200 Series is UL 10C positive pressure fire rated up to 3 hours and compliant with NFPA 80, so it can be used on rated openings up to a 3 hour label. It also carries ANSI/BHMA A156.13 Series 1000 Grade 1 certification.
5) What do I have to specify when ordering a Sargent 8255 mortise lock?
Four decisions. Cylinder: standard cylinder, less cylinder, 70 prep for small format interchangeable core less core, or 60 prep for large format IC less core. Keying: keyed different, keyed alike, or to a supplied key code (pick none if you ordered less cylinder). Lever design: H001, H002, H003, H004, H005, H006 or H011 from the Studio Collection. And rose: E2 at 2-11/16 inches, E3 at 2-1/16 inches, E4 at 3-1/4 inches, or TR at 2-3/16 inches.
6) Will this Sargent lock work with our existing master key system?
The 8200 Series lock body accepts all Sargent key systems, including Degree, Signature, KESO and XC. Standard cylinders here are the LA keyway. If your building is already keyed in an IC system, order the 70 prep (small format IC) or 60 prep (large format IC) less core and drop in the cores you already use.
7) What is a comparable Grade 1 office/entrance mortise lock to the Sargent 8255 from another manufacturer?
The Cal-Royal NM8050 is the closest match in function: it is a heavy duty Grade 1 mortise lockset with an Entrance/Office function and an auxiliary deadlatch, sized for 1-3/4 inch doors. The Sargent 8255 is likewise a Grade 1 Office/Entry mortise lock with a lever trim. Cross-check keying before you swap, since the Sargent side is built around Sargent key systems with an LA keyway.
8) I need a storeroom function instead of office/entry on the same opening - what mortise lock should I use?
For a storeroom opening, 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 heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option for 1-3/4 inch doors. The Sargent 8255 is an Office/Entry function, where the outside lever can be left unlocked; a storeroom lock keeps the outside lever locked at all times and retracts the latch by key only.
9) What mortise lock do I use for a classroom door instead of the Sargent 8255?
Classroom openings need a classroom function rather than office/entry. The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors, and the Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with an auxiliary deadlatch, also for 1-3/4 inch doors. For classroom security with a visual indicator, the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset with an ANSI strike and steel escutcheon for 1-3/4 inch doors.
10) We want keypad access on the door instead of a key - what replaces the Sargent 8255?
Several electronic mortise locks cover that. The Accentra nexTouch NTM623-NR is a Grade 1 mortise lock with a capacitive touchscreen keypad, no deadbolt, and cylinder override. The BEST 45HZ EZ Series is an electronic keypad mortise lock with key override, and the Dormakaba E-Plex 2066 is an electronic pushbutton keyless mortise lock. The Sargent 8255 itself is a mechanical, non-electronic lock, so moving to any of these changes the door prep and adds power or battery considerations.
11) Can I use a Baldwin 6301 mortise lock body in place of the Sargent 8255?
Not as a direct drop-in. The Baldwin 6301 lever by lever entry/apartment mortise lock body uses a 2-1/2 inch backset and is listed for doors 1-3/4 inch and over, while the Sargent 8255 is built on a 2-3/4 inch backset for 1-3/4 inch doors. Different backsets mean different door prep, so the two are not interchangeable in an existing mortise pocket.
12) What mortise lock works for an access control opening where the lever needs to be released electrically?
For electrified openings, the Command Access ML190 is a heavy-duty motorized mortise lock with field selectable fail safe or fail secure operation on 24VDC in a storeroom function, the BEST 45HW is a heavy duty wired electromechanical mortise lock running 12V or 24V, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock with request to exit, keyed outside, on 12/24VDC for 1-3/4 inch doors. The Sargent 8255 as configured is a mechanical lock.
13) Is this mortise lock tough enough for a high traffic entrance?
Yes. It is a heavy duty Grade 1 commercial lock, and Sargent completed UL's Cycle Above and Beyond test at 16 million cycles (Verification ID V584148). That is the class of lock used on school, hospital and office corridor doors that see constant use.
14) Which rose size should I pick to cover the old prep on my doors?
Rose diameter is what decides whether the trim hides existing wear or filler around the spindle. The E4 at 3-1/4 inches is the largest and covers the most; E2 is 2-11/16 inches, TR is 2-3/16 inches, and E3 at 2-1/16 inches is the smallest and most exposed. If you are replacing an escutcheon trim with rose trim, go to the larger rose.
15) Is the Sargent 8255 an electronic or access control lock?
No. The 8255 is a mechanical key-operated mortise lock, not electronic. If you need credential or keypad access in a mortise prep, the TownSteel FME-2000 with RFID, the Schlage CO-100 standalone keypad mortise lock, or the BEST 45HZ EZ keypad mortise lock with key override are the electronic routes.
16) Can I change the lock function later if the room use changes?
The 8200 Series lock body supports on-site function switching, and the series covers 56 functions in total including mechanical, electromechanical, security and monitoring options. That means a building standardized on this body can be re-tasked from office/entry to another function without swapping the whole case.
17) Is there a non-keyed mortise lock version for interior doors that do not need a cylinder?
Yes. The Sargent 8255 is a keyed single cylinder lock, so for openings that do not need a key, look at the Hager 3850E, a Grade 1 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, or the Falcon MA101, a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating. Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors.
18) What is the difference between the Sargent 8255 and the BEST 45H mortise lock body?
The BEST 45HCA 45H Series is a heavy duty mortise lock body with a Public Entrance function and field reversible operation, supplied as a lock body. The Sargent 8255 is a complete heavy duty Office/Entry mortise lock with Studio Collection levers, rose trim in E2, E3, E4 or TR sizes, and a keyed single cylinder. If your existing trim is staying and only the lock body is being replaced, the body-only route is the narrower purchase.
19) Which mortise lock should I specify for a bathroom or bedroom door instead of the office/entry Sargent 8255?
Privacy function is the right call there. The Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset for 1-3/4 to 2 inch doors, matching the 2-3/4 inch backset the Sargent 8255 uses, and the Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with a deadbolt for 1-3/4 inch doors.
20) Is a Schlage L0170 half dummy the same thing as a Sargent 8255?
No. The Schlage L0170 is a Grade 1 non-keyed half dummy trim with no latching mechanism at all, used on inactive leaves and pull-side applications. The Sargent 8255 is a keyed single cylinder Office/Entry mortise lock with a working latchbolt. Emtek dummy mortise entrance locksets such as the 3102 Memphis and 3104 Hamilton are the same story - trim only, no function.
21) For a behavioral health or ligature-resistant opening, what mortise lockset should I look at instead?
The TownSteel MRX-L-01 is a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with a passage function for 1-3/4 inch doors, and the MRX-A-01 is the same passage function with ligature resistant arch trim. The Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless. The Sargent 8255 uses conventional Studio Collection lever trim, which is not a ligature resistant design.
22) We need credential or card access on a classroom door - what are the mortise options?
The TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID technology for 1-3/4 inch doors, and the FME-4000 adds an electronic intruder classroom function with RFID. For wireless management, the Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating. The Sargent 8255 carries a UL 10C fire rating up to 3 hours as a mechanical lock.
23) Will a Marks USA 21AC or 22AC mortise lock substitute for the Sargent 8255 on a commercial door?
No. The Marks USA 21AC and 22AC are entrance double cylinder ornamental iron mortise locks with a round knob, listed for 1 inch doors - that is narrow-stile ornamental ironwork, not a standard commercial wood or hollow metal door. The Sargent 8255 is a single cylinder lever lock for 1-3/4 inch doors on a 2-3/4 inch backset.
24) What finishes does the Sargent 8200 mortise lock come in for matching existing hardware?
Sixteen finishes, so matching an existing building standard is usually straightforward: 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, 10B oil rubbed dark oxidized bronze, 10BE and 10BL dark oxidized 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 and WSP white suede powder coat. 26D and 32D are the usual commercial defaults.
25) Do you have an installation template for cutting the door prep for a Sargent 8200 mortise lock?
Yes. Sargent publishes a 7800 and 8200 Series mortise lock template covering all sectional rose trims and escutcheon trims, plus an installation guide specific to mortise locks with Studio Collection levers. Both are available with the product, along with the 7800/8200 mortise lock catalog. Use the template to lay out the lock case pocket and trim holes before routing.
How fast can I get the Sargent 8255 TR H001 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 8255 TR H001 26D come with a warranty?
Absolutely. The Sargent 8255 TR H001 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 8255 TR H001 26D?
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