Sargent 8200 Series Office or ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$638.14
$362.89
Sargent 8200 Series Office or Entry Lock Function Mortise Body with 1-3/4" Door Compatibility

Sargent 8200 Series Office or Entry Lock Function Mortise Body with 1-3/4" Door Compatibility

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Model: BP-8255-26D
From the 8200 Series Collection
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$638.14
$362.89
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Sargent 8200 Series Mortise Lock Body with 1-3/4" Door Compatibility and Multi-Function Support

Professional Mortise Lock Body Solution

The Sargent 8200 Series mortise lock body delivers maximum security, performance and durability with industry-benchmark construction. This robust mortise body accommodates doors from 1-3/8" to 6" thick with a standard 2-3/4" backset and features cold forged steel hubs for exceptional strength. The lock body supports 54 different functions including 4 electrical functions and requires a minimum 4-1/2" stile width for standard installation.

Professional Features & Benefits

  • Door Thickness Compatibility: Accommodates doors ranging from 1-3/8" to 6" thick for versatile installation applications across various door types.
  • Multi-Function Capability: Supports 54 functions including 4 electrical functions, the most in the industry for broad application flexibility and future adaptability.
  • Heavy-Duty Construction: Cold forged steel hubs and brass, bronze or stainless steel front plate provide exceptional durability for commercial applications.
  • Minimum Stile Requirements: 4-1/2" minimum stile for standard functions, 4-3/4" minimum stile for electrical function locks ensures proper installation clearance.
  • Field Reversible Design: Easily re-handed without removing parts or opening the lock case for installation convenience and reduced labor costs.
  • ANSI/BHMA Compliance: Front plate meets ANSI/BHMA Standard A156.115 specifications for professional-grade performance and code compliance.
  • Auxiliary Deadlatch: Stainless steel auxiliary deadlatch provides enhanced security and non-handed operation for reliable locking performance.
  • Manufacturer Warranty: 10 year limited warranty on mechanical components, 2 year limited warranty on electrified locks 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 8200 Series mortise lock bodies deliver professional-grade reliability with cold forged steel construction and brass, bronze or stainless steel components rated for demanding commercial applications. Backed by a 10 year limited warranty on mechanical components and 2 year limited warranty on electrified versions. Engineered for demanding commercial applications where dependable performance and multi-function versatility are essential.

Product Specs

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

Sargent BP-8255-26D – Frequently Asked Questions

1) What door thickness will the Sargent 8200 Series mortise lock body handle?
The 8200 Series mortise body covers doors from 1-3/8 inch all the way to 6 inch thick, so it handles standard 1-3/4 inch commercial doors and unusually thick doors on the same body. That range is wider than most competing mortise bodies, which are commonly built for 1-3/4 inch only.
2) How much stile do I need on an aluminum or narrow door for a Sargent 8200 mortise lock?
Plan on 4-1/2 inches of stile minimum for standard functions, and 4-3/4 inches if you are using one of the electrified functions. Anything narrower than that will not take the 8200 body, and you should be looking at a narrow stile deadlatch instead.
3) What backset does the Sargent 8200 mortise lock use, and will it hit my existing door prep?
Standard 2-3/4 inch backset, which is the normal backset for a commercial mortise pocket. If your door is already prepped for a mortise lock at 2-3/4 inches, the 8200 body drops into that geometry; a cylindrical bore prep will not work, that needs a routed mortise pocket.
4) Do I need to order the Sargent 8200 handed, or can I re-hand it in the field?
No handing to specify. The 8200 body is field reversible and can be re-handed without removing parts or opening the lock case, and the stainless auxiliary deadlatch is non-handed. That makes it practical to stock one body for both left and right hand openings across a building.
5) What does the Office/Entry function on a Sargent 8200 actually do?
Office/Entry means the outside lever is locked or unlocked by key, or by a thumbturn/button depending on the function chosen, and the inside lever always retracts the latch for free egress. It suits a tenant suite or office door someone wants left unlocked during business hours and secured on the way out. If you need a door that stays locked outside at all times and is only entered by key, order a storeroom function instead, such as the Accentra 8805FL or the Cal-Royal NM8080.
6) Is the Sargent 8200 mortise lock Grade 1?
Grade 1, heavy duty, and built for commercial use, with cold forged steel hubs and a brass, bronze or stainless steel front plate. The front plate meets ANSI/BHMA A156.115. That is the specification level institutional and MRO buyers standardize on for high traffic openings in schools, hospitals and government buildings.
7) Am I buying a complete mortise lockset or just the lock body?
This is the mortise lock body only. Levers or knobs, roses or escutcheons, and the cylinder are separate line items, so budget for trim and a cylinder to finish the opening. If you would rather order a complete assembly with trim already included, look at the Cal-Royal NM8050 Grade 1 Office/Entrance mortise lockset or the Hager 3850E office mortise lock with lever and escutcheon.
8) My doors are thicker than 1-3/4 inches. Will a standard mortise lock still work?
Most commercial mortise locks are built for 1-3/4 inch doors only, including the Cal-Royal NM8050 and NM8080 and the Corbin Russwin ML2003. The Sargent 8200 body goes to 6 inches thick, so on heavy timber, lead lined, or acoustic doors it is one of the few bodies that fits without a special order.
9) What is the closest Grade 1 office/entrance mortise lock to the Sargent 8200 from another manufacturer?
The Cal-Royal NM8050 is the nearest match. It is a heavy duty Grade 1 mortise lockset in the Entrance/Office function with an auxiliary deadlatch, the same Grade 1 rating and Entrance/Office function the Sargent 8200 mortise body carries, and it also uses an auxiliary deadlatch. The difference is door range: the NM8050 is specified for a 1-3/4 inch door, while the Sargent 8200 body covers 1-3/8 inch through 6 inch doors. On a standard 1-3/4 inch commercial door either will serve the same opening; on a thick door the Sargent body is the one that still fits.
10) I need a mortise lock for a classroom instead of an office door - what should I order?
Move to a classroom-function body rather than the Sargent 8200, which is built as an Entrance/Office function. The Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with auxiliary deadlatch for a 1-3/4 inch door, and the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series, also specified at 1-3/4 inch. Both keep the Grade 1 rating the Sargent 8200 carries while giving you the classroom keying behavior an office function will not provide.
11) The door needs to lock behind you every time and stay locked - is the office function right?
No. An office or entrance function lets the inside lever always retract the latch and lets the outside be left unlocked, which is what the Sargent 8200 Entrance/Office body does. For an opening that must stay secured with key access only, use a storeroom function: the Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option on a 1-3/4 inch door, and the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series supplied with the Arcadia lever.
12) Is a Baldwin 6301 mortise lock body a drop-in swap for a Sargent 8200?
Not on the same door prep. The Baldwin 6301 entry/apartment mortise lock body uses a 2-1/2 inch backset, and it is offered knob by knob or, as the 6301LS, lever by lever, for doors 1-3/4 inch and over. The Sargent 8200 body uses a standard 2-3/4 inch backset. The backset difference means the cylinder and lever centerlines land in different places, so a swap between the two calls for reworking the door edge and face prep rather than dropping one into the other's mortise.
13) What mortise lock should I use for a behavioral health or psychiatric unit door?
An office or entry lock with a projecting lever is not the right specification for those openings. Use an anti-ligature set: the TownSteel MRX-L-01 is a stainless steel Grade 1 heavy duty anti-ligature lever mortise lockset in the passage function for 1-3/4 inch doors, 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 that is ligature resistant and ADA compliant in satin stainless steel.
14) For a classroom door that needs to be locked from inside during a lockdown, what mortise lock covers that?
An Entrance/Office body will not give you inside lockdown. Two options do: the BEST 45HCA heavy duty mortise lockbody in the intruder function, and the TownSteel FME-4000, an electronic intruder classroom mortise lockset with RFID, Grade 1 heavy duty for a 1-3/4 inch door. If you want the lockdown state visible from the corridor, the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset for a 1-3/4 inch door.
15) I have an aluminum storefront door with an Adams Rite deadlatch - will the Sargent 8200 work there?
That opening needs a lock built for the narrow stile and the existing deadlatch. The Alarm Lock DL1300NW Trilogy Networx wireless electronic mortise lock with keypad is made for Adams Rite deadlatches, and the Kaba Ilco BR Series is a glass door bottom rail lock for that style of entrance. The Sargent 8200 mortise body requires a 4-1/2 inch minimum stile for standard functions and 4-3/4 inch for electrical function locks, which a narrow stile storefront door typically does not provide.
16) Can the Sargent 8200 be electrified, or do I need a different lock for access control?
The 8200 platform supports 54 functions, four of them electrical, so an electrified version exists within the series, but this particular body is a mechanical Office/Entry lock with no electronics. For a card or keypad opening you would specify an electrified 8200 function, or step to a standalone electronic mortise lock like the Schlage CO-100 or the BEST 45HW wired electromechanical mortise lock at 12V/24V.
17) Should I use a mortise lock or a cylindrical lock on a commercial entry door?
A mortise body like the 8200 goes into a routed pocket in the door edge and gives you a heavier lock case, an auxiliary deadlatch, and a function range a cylindrical lock cannot match. A cylindrical lock, such as the Schlage PC10, only needs a bored hole and installs faster on a door that has never been prepped. If the door already has a mortise pocket, stay with a mortise body; retrofitting a cylindrical lock into a mortise pocket needs a filler plate and rarely looks right.
18) I need classroom function instead of office function, in a similar Grade 1 mortise lock. What are my options?
The 8200 platform itself covers 54 functions, so a classroom version exists in the series and is ordered by function code. In another brand, 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 classroom mortise lockset with auxiliary deadlatch, also 1-3/4 inch.
19) Can I use a keypad or card-credential mortise lock in place of the Sargent 8200 on the same door?
Yes, if you want credential access rather than a key. The Sargent 8200 body covered here is a non-electronic mechanical lock. Electronic mortise options include the Dormakaba E-Plex E5086, a Grade 1 entry/egress pushbutton and card lock in a back to back mortise configuration; the Schlage Electronics LEMD-GRW, a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and a 3 hour fire rating; and the TownSteel FME-2000, a Grade 1 heavy duty classroom mortise lockset with RFID for a 1-3/4 inch door. These need power and a credential program behind them, which a mechanical body does not.
20) What is the difference between the Sargent 8200 mortise body and the BEST 45H mortise lock body?
Both are heavy duty mortise lock bodies that are field reversible without disassembly. The BEST 45H is catalogued in the Public Entrance function, while the Sargent 8200 body covered here is the Entrance/Office function and is Grade 1. If the opening calls for public entrance behavior, the 45H is the body to specify; for office or entry keying on the same door prep, the 8200 is the direct answer.
21) Which mortise lock should I use for a restroom or bedroom door instead of the office function?
An office or entry function is keyed for controlled access, not for occupancy privacy, so it is the wrong choice on a restroom or bedroom. Use a privacy function: the Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with deadbolt for a 1-3/4 inch door, and the Hager 3840S is a Grade 1 privacy mortise lock on a 2-3/4 inch backset covering 1-3/4 inch to 2 inch doors.
22) I do not need the door keyed at all - is there a cheaper mortise option than an office function lock?
If the opening only needs the latch held and released, a passage function mortise lock covers it without cylinder or keying. The Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for a 1-3/4 inch door, the Falcon MA101 is a Grade 1 heavy-duty mortise passage lock that is field reversible and fire rated, and the Hager 3810S is a Grade 1 passage mortise lock with rose on a 2-3/4 inch backset for 1-3/4 inch to 2-1/2 inch doors. None of them will secure the door, which the Entrance/Office Sargent 8200 will.
23) Will an Emtek 3102 Memphis mortise entrance lockset work as a replacement for a Sargent 8200 office lock?
No. The Emtek 3102 Memphis is a dummy function - it has no working latch or locking mechanism and is meant for an inactive leaf or a pull-only door. The same applies to the Emtek 3019 Brisbane, 3104 Hamilton and 3106 Manhattan, all dummy function. The Sargent 8200 is an operating Entrance/Office mortise body with a stainless steel auxiliary deadlatch. If you want the Emtek trim appearance on a door that actually latches, you need a functioning lock body behind it, not a dummy set.
24) Can I get a mortise lock in the office function that unlocks from an access control panel?
The Sargent 8200 body covered here is mechanical and not electronic, though the 8200 platform supports 54 functions including 4 electrical functions. If you want the electrified hardware itself, the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit and 12/24VDC operation in the corridor function, and the Command Access ML190 is a heavy-duty motorized mortise lock with field selectable fail safe or fail secure operation on 24VDC in the storeroom function. Note the Sargent 8200 needs a 4-3/4 inch minimum stile for electrical function locks versus 4-1/2 inch for standard.
25) Will a Kaba Ilco 185 mortise lock do the same job as a Sargent 8200?
No. The Kaba Ilco 185 Series is a deadbolt function mortise lock supplied with no handing. A deadbolt throws a bolt and nothing else - there is no latch and no lever operation, so it will not release the door when someone turns a handle. The Sargent 8200 is an Entrance/Office mortise body with a stainless steel auxiliary deadlatch that does the latching work. Pair a deadbolt with a latching lock, or specify the 8200; do not substitute one for the other.
26) Do the Alarm Lock Trilogy electronic mortise locks fit the same doors as the Sargent 8200?
They cover a much narrower door range. The Alarm Lock DL2700CR and DL3500CR are Grade 1 classroom function electronic mortise locks specified for doors 1-5/8 inch to 1-7/8 inch, and the DL4500 electronic mortise deadbolt with privacy keypad carries the same 1-5/8 inch to 1-7/8 inch range. The Sargent 8200 body takes doors from 1-3/8 inch to 6 inch. On an unusually thin or thick door, check the Trilogy range before committing.
27) Is a Schlage PC10 an alternative to the Sargent 8200 mortise lock?
Only if you are changing the door prep entirely. The Schlage PC10 is a Grade 1 passage cylindrical lock with rose, non-keyed, for a 1-3/4 inch door - a cylindrical lock installs through two bored holes in the door face, while the Sargent 8200 is a mortise lock that requires a pocket routed into the door edge. The two preps are not interchangeable, and the PC10 is passage function against the 8200's Entrance/Office.
28) Are the Schlage LE Series mobile-enabled mortise locks the same grade as the Sargent 8200?
No. The Schlage Electronics LEBMB-ADD mobile-enabled mortise lock with push button and LED, which covers privacy, office and apartment functions on a 1-3/4 inch door, is Grade 2 with a 3 hour fire rating. The Sargent 8200 mortise body is Grade 1 and heavy duty. If your specification calls for Grade 1 on the opening, the Schlage Electronics LEMD-GRW in the ENGAGE Series is the Grade 1 mobile-enabled option with a 3 hour fire rating and a 125kHz proximity reader.
29) What finish does the Sargent 8200 mortise body come in?
Satin chrome over nickel, 26D. That is the standard commercial finish, so it matches the satin chrome levers, closers and exit devices already hanging on most office and institutional openings. The body itself sits inside the door pocket, so only the front plate shows on the door edge.
30) Are there install templates for prepping a door for the Sargent 8200 mortise lock?
Sargent publishes an installation template covering the 7800 and 8200 mortise locks with all sectional rose trims and escutcheon trims, plus the full 7800/8200 mortise lock catalog with the function list. Use the template to lay out the pocket, the hub centers and the trim holes before you rout, since the pocket depth and the 2-3/4 inch backset have to be right the first time on a hollow metal or wood door.
31) Is there a mortise lock that works without wiring or battery changes?
The Sargent 8200 mortise body is mechanical, not electronic, so it needs no power at all. Among the electronic mortise options, the Dormakaba PowerPlex P2066 Series is the one designed to generate its own power rather than run off a wired supply, while the BEST 45HW wired electromechanical mortise lock runs on 12V or 24V and the Codelocks CL2255 electronic tubular mortise latch is a medium duty CL2000 Series unit. If the opening has no power path and you do not want batteries in the schedule, the mechanical 8200 body is the straightforward answer.
32) What is the difference in duty rating between the Sargent 8200 and the Codelocks CL2255?
The Sargent 8200 mortise body is heavy duty and Grade 1 for commercial use. The Codelocks CL2255 electronic tubular mortise latch is a medium duty unit in the CL2000 Series with a brushed steel finish. For a high-traffic commercial opening, the heavy duty Grade 1 body is the one specified for that cycle load; the CL2255 suits lighter-use doors where keyless entry matters more than the duty rating.
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Does the Sargent BP-8255-26D come with a warranty?
Absolutely. The Sargent BP-8255-26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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