Sargent 8204 Heavy Duty Single...
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$2,077.90
$1,267.58
Sargent Sargent 8200 Series - (8204) Storeroom or Closet Function Rose Trim, Heavy Duty Single Cylinder Mortise Lock, Grade 1 SGT-8204

Sargent 8204 Heavy Duty Single Cylinder Mortise Lock with Storeroom Function and Grade 1 Rating

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Model: 8204 EA 26D
From the 8200 Series Collection
$2,077.90
$1,267.58
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,077.90
$1,267.58
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Sargent 8204 Heavy Duty Single Cylinder Mortise Lock with Storeroom Function Grade 1

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8204 heavy duty single cylinder mortise lock delivers maximum security, performance, and durability as the industry benchmark for commercial mortise locks. This heavy-duty lock features storeroom function with Grade 1 operational rating and 2-3/4" backset for standard 1-3/4" door thickness. Built with high-quality components and patented design, this lock integrates with all Sargent key systems including Degree, Signature, KESO, and XC for comprehensive security solutions.

Professional Features & Benefits

  • Dimensions & Compatibility: 2-3/4" backset designed for standard 1-3/4" door thickness with field reversible handing for versatile installation options.
  • Exceptional Durability: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for long-term reliability in high-traffic environments.
  • Grade 1 Performance: ANSI/BHMA A156.13 Series 1000 Operational Grade 1 certification ensures superior strength and reliability for commercial applications.
  • Heavy-Duty Construction: Patented design and construction with high-quality components rated for maximum security and performance in demanding commercial applications.
  • Universal Key System Integration: Compatible with all Sargent key systems including Degree, Signature, KESO, and XC for flexible security management.
  • Fire-Rated Construction: UL 10C Fire-Rated up to 3 hours with positive pressure certification for life safety compliance.
  • Comprehensive Certifications: ADA compliant, NFPA 80 compliant, and multiple ASTM certifications for code compliance and accessibility.
  • 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 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 8204 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 provides comprehensive protection for demanding commercial applications. Engineered as the industry benchmark for mortise locks, this system offers maximum security, performance, and durability where dependable access control is 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:
Storeroom/Closet
Product Type:
Mortise Locks
Duty Level:
Heavy Duty
Handle Type:
Lever
Segment:
Door Hardware
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Storeroom
Product Category:
Mechanical Locks
Collection:
8200 Series
Department:
Door Hardware

Sargent 8204 EA 26D – Frequently Asked Questions

1) What does storeroom function mean on the Sargent 8204, and is it right for a supply or mechanical room?
Storeroom function means the outside lever is always locked. You get in with a key only, and the key does not leave the lever unlocked behind you, so the door secures itself every time it closes. Inside lever always retracts the latch for free egress. That's exactly what you want on a storeroom, janitor closet, electrical or mechanical room, IT closet, or anywhere the door must never be left open by accident. If you need staff to be able to leave the door unlocked during business hours, storeroom is the wrong function and you want an office or entrance function instead.
2) Can the Sargent 8204 be used on a fire rated door?
Yes. The 8204 is UL 10C fire rated up to 3 hours with positive pressure certification, and it's NFPA 80 compliant, so it can go on a labeled opening up to a 3 hour rating. Because storeroom function keeps the door latched and self-locking with free egress from the inside, it also suits stairwell-adjacent and life safety applications where the door must stay latched.
3) Do I need to order the Sargent 8204 handed, or can it be flipped in the field?
Handing is field reversible on the 8204, so one lock covers both left and right hand openings and you can flip it on site without a different part number. There are still Left Hand and Right Hand selections on the order, so specify the hand you're installing and it will ship set that way.
4) Can the Sargent 8204 be keyed into my building's existing Sargent master key system?
Yes. The 8204 works with all Sargent key systems, including Degree, Signature, KESO and XC, so it drops into an existing Sargent keyway and master key hierarchy. If your facility runs interchangeable cores, order the 70 prep for small format IC or the 60 prep for large format IC and supply your own cores. If you're keying fresh, choose keyed different, keyed alike across a group of doors, or give us your key code.
5) Is a mortise lock like the Sargent 8204 the right choice, or should I use a cylindrical lockset?
A mortise lock needs a rectangular pocket routed into the edge of the door, so it's a bigger prep, but it puts a heavier lock case and a stronger latch inside the door and it's what gets specified on doors that take abuse or need a fire label. If your door is already mortise prepped, the 8204 goes straight back in. If your doors are bored for a cylindrical lock (two round holes, no pocket), you cannot fit a mortise lock without routing them, and a Grade 1 cylindrical unit is the sensible swap. ZenSupply carries cylindrical options like the Schlage PC10 Grade 1 lock for non-keyed openings.
6) What are the alternatives to the Sargent 8204 if I need a Grade 1 storeroom mortise lock from another brand?
Two direct equivalents. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever. The Cal-Royal NM8080 is a Grade 1 heavy duty storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. Both land on the same function and the same grade as the 8204. Where the 8204 separates itself is the keying: it integrates with the Sargent Degree, Signature, KESO and XC systems, so if the rest of your building is on Sargent keys, staying in the family saves you a second key system.
7) Which mortise lock should I use instead of a Sargent 8204 on a classroom door?
Storeroom function locks the outside lever at all times and requires a key for every entry, which is not how a classroom door is normally set up. For classroom function in a mortise body, 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. The Sargent 8204 storeroom body stays the right choice for storage rooms, closets, mechanical spaces and IT rooms.
8) What is the closest cross-brand equivalent to a Sargent 8204 storeroom mortise lock?
The Sargent 8204 is a Grade 1 storeroom-function mortise lock with a lever handle. The nearest peers by grade and function are the Accentra 8805FL, a Grade 1 storeroom mortise lock with an Arcadia lever, and the Cal-Royal NM8080, a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option. Both match the 8204 on Grade 1 rating and storeroom function, so the deciding factors are trim style, lever design and which key system the building already standardizes on.
9) I do not need the door keyed - what non-keyed mortise lock replaces a Sargent 8204?
The Sargent 8204 is a keyed single cylinder lock, so it is more hardware than a door that only needs to latch. For a non-keyed mortise body the Schlage PM010 is a Grade 1 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 3810S is a 3800 Series passage mortise lock with a rose and 2-3/4 inch backset. All three drop the cylinder and the keying decision entirely.
10) I need the outside lever released from an access control system - what takes the place of a Sargent 8204?
The Sargent 8204 is a mechanical, non-electronic lock, so it cannot be released remotely. For an electrified mortise body, the Command Access ML190 Series is a heavy duty motorized mortise lock in storeroom function with field selectable fail safe or fail secure operation on 24VDC, and the Schlage L9092EU 03A is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit on 12/24VDC for 1-3/4 inch doors. The ML190 matches the 8204's storeroom function while adding electric control, so it is the closer swap on a storage or IT room.
11) Which mortise locks match the Sargent 8204 for a 3 hour fire rated opening?
The Sargent 8204 is UL 10C fire rated up to 3 hours with positive pressure certification and is NFPA 80 compliant. Among the peers, the Schlage LEMD-GRW ENGAGE wireless mortise lock carries a 3 hour fire rating at Grade 1, and the Falcon MA101 Grade 1 heavy duty mortise passage lock is fire rated. The Schlage LE Series LEBMB-ADD also lists a 3 hour fire rating but at Grade 2 rather than Grade 1, which matters where the specification calls for Grade 1 on the opening.
12) Can a Baldwin 6310 storeroom mortise lock be swapped into a door prepped for a Sargent 8204?
Not without checking the backset. The Sargent 8204 uses a 2-3/4 inch backset for a standard 1-3/4 inch door. The Baldwin 6310 entry/storeroom mortise lock body uses a 2-1/2 inch backset and fits doors 1-3/8 inch and over, and the 6310190RRLS is the right hand reverse lever by lever version of that same 2-1/2 inch backset body. A quarter inch difference in backset puts the cylinder and spindle in a different place on the door face, so the existing prep will not line up.
13) Does an RFID or mobile credential mortise lock give me the same Grade 1 rating as the Sargent 8204?
Not all of them. The Sargent 8204 is Grade 1. Among credentialed mortise peers, the TownSteel FME-2000 with RFID is Grade 1 heavy duty, the Schlage LEMD-GRW ENGAGE wireless mortise lock with a 125 kHz proximity reader is Grade 1, and the Dormakaba E-Plex E5086 back to back pushbutton and card mortise lock is Grade 1. The Dormakaba Saffire LX-I-M002 RFID mortise lockset with BLE mobile access is a BHMA Grade 2 device, so it does not meet a Grade 1 specification.
14) What mortise lock do I use instead of a Sargent 8204 for a classroom that needs lockdown from inside the room?
Storeroom function on the Sargent 8204 is keyed from the outside, so a teacher cannot lock the door without stepping into the corridor. For inside lockdown in a mortise body, the BEST 45HCA heavy duty mortise lockbody comes in intruder function, the TownSteel FME-4000 is an electronic intruder classroom mortise lockset with RFID at Grade 1 heavy duty for 1-3/4 inch doors, and the Marks USA LA318GJ is a Grade 1 classroom security indicator mortise lockset for 1-3/4 inch doors with an ANSI strike. The indicator on the LA318GJ shows locked status from the corridor side.
15) Is the Sargent 8204 tough enough for a high traffic door that gets used all day?
It's a Grade 1 heavy duty lock, ANSI/BHMA A156.13 Series 1000 Operational Grade 1, and Sargent completed UL's Cycle Above and Beyond test on it at 16 million cycles. Grade 1 is the top commercial tier and is what specifiers call for on schools, hospitals, and public buildings. For a storeroom or service door in a hospital, school corridor, or hotel back-of-house, it's specified above what the traffic demands.
16) Which rose size do I pick if I'm replacing an old mortise lock and want to cover the existing marks on the door?
Rose diameter is your cover. The L rose is the largest at 3-1/2 inches (89mm), then E at 3-1/16 inches (78mm), O at 2-3/4 inches (67mm), and LN is the smallest at 2 inches (51mm). If the door has wear rings, paint shadows or old fastener holes around the spindle, measure the marked area and pick a rose that exceeds it. Going the other way, LN is the choice when you want the least trim on a narrow face or a glazed door where a big rose crowds the light.
17) I need a mortise lock with a keypad or card reader instead of a key. What should I look at instead of the Sargent 8204?
The 8204 is a mechanical lock with no electronic components, so it's key-only. For credential access on a mortise prep, ZenSupply carries several: the Alarm Lock DL3500CR Trilogy is a Grade 1 electronic mortise lock with 300 user codes and classroom function for 1-5/8 to 1-7/8 inch doors, the Dormakaba E-Plex 2066 is a pushbutton keyless mortise lock, and the TownSteel FME-2000 is a Grade 1 heavy duty RFID mortise lockset for 1-3/4 inch doors. Note the Alarm Lock units want a thicker door than the 8204's 1-3/4 inch standard, so check your leaf before you switch.
18) Can I standardize the Sargent 8204 across a whole building and just change the function per door?
That's what the 8200 Series is built for. The 8204 covers your storeroom, closet and service doors, and it shares the series lever, rose and finish choices, so every opening looks the same whether it's a storeroom, a classroom or an office. Pick one lever style and one finish across the job, then vary the function number by door use. Keying it all under one Sargent system, Degree, Signature, KESO or XC, means one key hierarchy for the whole facility.
19) Does the Sargent 8204 meet ADA requirements for accessible openings?
Yes, the 8204 is ADA compliant, and it comes with lever trim rather than a knob, which is what accessibility requires since a lever operates without grasping, pinching or twisting the wrist. All eight trim options, A, B, E, F, J, L, P and W, are levers.
20) Can I order the Sargent 8204 without a cylinder so I can use my own cores?
Yes, three ways. Less Cylinder ships the lock bare so you supply the cylinder entirely, and you'd pair that with the None keying option. The 70 option ships prepped for a small format interchangeable core, less core. The 60 option ships prepped for a large format interchangeable core, less core. Facilities that already stock their own IC cores usually take the 70 or 60 prep, since it keeps every new lock on the same core inventory.
21) What is the difference between the Sargent 8204 and a mortise lock body sold without trim?
The Sargent 8204 is supplied with rose trim and a lever, in eight lever designs and four rose sizes from the 2 inch LN rose up to the 3-1/2 inch L rose. The BEST 45H Series is a heavy duty mortise lock body in public entrance function with field reversible operation, and the BEST 45HCA is a heavy duty mortise lockbody with intruder function - those are the lock body alone, so trim is specified separately. Choose the body-only route when you are reusing existing trim or matching a lever family already installed.
22) Can I use an electronic mortise lock in place of the Sargent 8204 for audit trail and code access?
Yes, if the opening can take power or batteries. The Sargent 8204 is a non-electronic mechanical lock. Electronic mortise peers include the Alarm Lock DL3500CR, a Grade 1 Trilogy electronic mortise lock with 300 user codes in classroom function for 1-5/8 to 1-7/8 inch doors, the TownSteel FME-2000, a Grade 1 heavy duty classroom mortise lockset with RFID, and the Schlage LEMD-GRW, a Grade 1 ENGAGE wireless mortise lock with a 125 kHz proximity reader. Note the door thickness limits differ from a mechanical body, and the electronic options listed here are classroom or credentialed functions rather than storeroom.
23) What mortise lock replaces a Sargent 8204 on a restroom or patient room door that needs privacy?
Storeroom function is key-operated from outside with no inside locking control, which is wrong for a restroom. Privacy peers in a mortise body include the Hager 3840S, a 3800 Series Grade 1 privacy mortise lock with a 2-3/4 inch backset for 1-3/4 to 2 inch doors, and the Cal-Royal NM8440, a heavy duty Grade 1 privacy mortise lockset with a deadbolt for 1-3/4 inch doors. The Hager shares the 8204's 2-3/4 inch backset.
24) I need a storeroom mortise lock that takes an interchangeable core - how does that compare to the Sargent 8204?
The Sargent 8204 can be ordered with small format interchangeable core prep or large format interchangeable core prep, less core, so it fits either core program alongside a standard cylinder or less cylinder build. The Cal-Royal NM8080 is a heavy duty Grade 1 storeroom mortise lockset with an interchangeable core option and covers the same function on a 1-3/4 inch door. If the facility is already keyed on a Sargent system, the 8204 stays inside it; if the core program is set by another supplier, the core prep option is what you are matching.
25) Is a mortise deadbolt the same thing as a Sargent 8204 storeroom lock?
No. The Sargent 8204 is a latching storeroom lock with a lever, so the door latches on close and the lever retracts the latch from inside. The Kaba Ilco 185 Series is a mortise deadbolt with no handing, and the Alarm Lock DL4500 is a Grade 1 electronic mortise deadbolt with 2,000 user codes and a privacy keypad for 1-5/8 to 1-7/8 inch doors. A deadbolt bolts the door but does not latch it or give you a lever, so it is usually added alongside a latching lock rather than used in place of one.
26) What do I use instead of a Sargent 8204 on a behavioral health or patient room door?
The Sargent 8204 is a standard lever and rose trim lock, and a projecting lever is generally not acceptable in a ligature-risk area. Ligature resistant mortise peers include the TownSteel MRX-L-01, a Grade 1 heavy duty anti-ligature lever mortise lockset in stainless steel with passage function, the TownSteel MRX-A-01, a Grade 1 ligature resistant arch trim mortise lockset in satin stainless steel, and the Marks USA 5PDN, a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant. All three listed here are passage function rather than keyed storeroom.
27) I have a glass door with a narrow bottom rail - can I fit a Sargent 8204?
No. The Sargent 8204 is a heavy duty mortise lock sized for a standard 1-3/4 inch door with a 2-3/4 inch backset, which a glass door rail cannot accept. The Kaba Ilco BR Series is a glass door bottom rail lock built for that application, and the Alarm Lock DL1300NW Trilogy Networx wireless electronic mortise lock with keypad is made for Adams Rite deadlatches found in narrow stile aluminum doors. Match the lock to the rail or stile before ordering.
28) What finish do I order for the Sargent 8204 to match the rest of my hardware?
Sixteen finishes are available on the 8204. The commercial defaults are 26D satin chrome and 32D satin stainless, which is what most schools, hospitals and offices already run. For brass and bronze there's 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, and three dark oxidized bronze variants: 10B oil rubbed, 10BE, and 10BL clear coated, plus 20D dark statuary bronze. Nickel comes as 14 bright and 15 satin, polished options are 26 bright chrome and 32 bright stainless, and there are two powder coats, BSP black suede and WSP white suede. Match the finish code on your existing hardware rather than the color name, since the number is the standard designation across manufacturers.
29) Is the Codelocks CL2255 a substitute for a Sargent 8204?
They are built for different traffic. The Sargent 8204 is a heavy duty Grade 1 commercial lock. The Codelocks CL2255 is a medium duty electronic tubular mortise latch in the CL2000 Series with a brushed steel finish. Medium duty and a tubular latch body suit lighter interior traffic; a high-cycle storeroom or corridor door in a school or hospital is where the heavy duty Grade 1 body belongs.
30) Will an Emtek mortise entrance lockset work as a substitute for the Sargent 8204?
No. The Emtek 3102 Memphis, 3104 Hamilton, 3106 Manhattan and 3019 Brisbane mortise entrance locksets are dummy function, meaning they are fixed trim with no working latch or cylinder. The Sargent 8204 is a keyed commercial storeroom lock. Dummy trim is used on an inactive leaf or a pull-only door; it will not secure a storeroom.
31) How does the Sargent 8204 compare with a keyless pushbutton mortise lock for a storage room I do not want to key?
The Sargent 8204 is a keyed single cylinder lock that ties into a Sargent key system. Keyless mortise alternatives include the Dormakaba E-Plex 2066, an electronic pushbutton keyless mortise lock for wide stile doors, the Dormakaba PowerPlex P2066, and the BEST 45HZ EZ Series electronic keypad mortise lock with key override. Keyless removes key distribution but adds code management and, on the E-Plex and EZ bodies, a battery or power consideration the 8204 does not have.
How fast can I get the Sargent 8204 EA 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 8204 EA 26D come with a warranty?
Absolutely. The Sargent 8204 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 8204 EA 26D?
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