Hager 3840S 3800 Series Grade ...
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$553.81
$344.21
Hager 3840S 3800 Series Grade 1 Privacy Mortise Lock with 2-3/4" Backset

Hager 3840S 3800 Series Grade 1 Privacy Mortise Lock with 2-3/4" Backset

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Model: 3840S US26D
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Hager 3840S 3800 Series Grade 1 Privacy Mortise Lock with 2-3/4" Backset

Heavy-Duty Commercial Privacy Lock Solution

The Hager 3840S from the 3800 Series delivers Grade 1 commercial-grade privacy lock performance with a 2-3/4" backset and non-keyed operation. This mortise lock features a 4-5/16" x 6" x 1" lock chassis with 3/4" throw latchbolt and accommodates door thickness from 1-3/4" to 2". BHMA certified to ANSI A156.13 Series 1000 Grade 1 standards and UL listed for 3-hour fire rating applications.

Professional Features & Benefits

  • Grade 1 Commercial Rating: BHMA certified to ANSI A156.13 Series 1000 Grade 1 for heavy-duty commercial, industrial, and institutional applications.
  • Precision Backset: 2-3/4" (70mm) backset with 3-5/8" (92mm) CTC length for standard commercial door preparations.
  • Robust Lock Chassis: 4-5/16" x 6" x 1" (110mm x 152mm x 25mm) mortise chassis provides exceptional strength and durability.
  • High-Performance Latchbolt: 3/4" (19mm) throw with anti-friction tongue in all stainless steel construction for smooth operation.
  • Fire-Rated Construction: UL/cUL listed for all functions up to 3 hours "A" label single doors with UL10C Positive Pressure rating.
  • Field-Reversible Design: Body is easily field reversible with concealed thru-bolts and no exposed mounting screws for clean installation.
  • Emergency Access: Privacy function (F22) includes emergency release on exterior side via supplied key for safety compliance.
  • Lifetime Manufacturer Warranty: Comprehensive lifetime warranty coverage for long-term confidence and protection.

Technical Specifications

  • ANSI/BHMA: BHMA Certified ANSI A156.13, Series 1000, Grade 1
  • Applications: Heavy Duty Commercial
  • Backsets: 2-3/4" (70mm)
  • Certifications: ADA Compliant ANSI A117.1 Accessibility Code
  • Commercial/Residential: Commercial
  • CTC Length: 3-5/8" (92mm)
  • Cylinder and Keyways: 6 Pin Cylinders, Schlage C Keyway
  • Door Strike: 1-1/4" x 4-7/8" ASA strike
  • Door Thickness: 1-3/4" - 2" (45 mm - 51 mm) Please specify door thickness if greater than 1-3/4" (45 mm) or the door has an offset prep
  • Electronic: No
  • Exposed Trim: Cast Zinc -Standard
  • Finishes: US3, US4, US10B, US26, US26D, US32D*
  • Functions: Privacy (F22)
  • Keyed: No
  • Lever Options: Archer, August, Charles, Johnston, Joshua, Louis, Warren, William and Withnell
  • Lock Chassis: 4-5/16" x 6" x 1" (110 mm x 152 mm x 25 mm)
  • Lock Type: 3/4" (19 mm) throw with anti-friction tongue, all stainless steel
  • Notes: Emergency release on exterior side via supplied key
  • Options: Tactile Warning
  • Rose Diameter: 2-7/16" (62mm)
  • Strikes: 1-1/4" x 4-7/8" (32 mm x 124 mm) ASA strike
  • Subcategory: Cylindrical Locks
  • Warranty: Lifetime

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/4" to 2"), mortise pocket dimensions, and handing requirements for this mortise lock.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces for the 4-5/16" x 6" x 1" lock chassis.
  3. Prepare door by cutting mortise pocket and drilling required holes for the 2-3/4" backset configuration and 3-5/8" CTC length specifications.
  4. Install the mortise chassis and secure with concealed thru-bolts per manufacturer torque specifications, ensuring proper alignment with door edge.
  5. Adjust the field-reversible mechanism for proper handing and test the 3/4" throw latchbolt operation with anti-friction tongue for smooth function.
  6. Test privacy function operation including emergency release mechanism 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
  • Industrial and Warehouse Facilities
  • Institutional Buildings
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Hager Quality?

Hager 3800 Series mortise locks deliver professional-grade reliability with cast zinc construction and all stainless steel latchbolt components rated for Grade 1 commercial performance. Lifetime warranty coverage and UL fire rating certification provide added confidence for demanding commercial applications. Engineered for heavy-duty commercial, industrial, and institutional environments where dependable privacy lock performance is essential.

Grade 1 mortise lock engineered for commercial and institutional openings. Anti-friction latchbolt with full deadbolt.

Product Specs

Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Mortise Locks
Subcategory:
Cylindrical Locks
ANSI/BHMA:
BHMA Certified ANSI A156.13, Series 1000, Grade 1
Keyed Function:
Non-Keyed
Commercial/Residential:
Commercial
Keyed:
No
Lock Type:
Cylindrical
Cylinder and Keyways:
6 Pin Cylinders, Schlage C Keyway
Product Attribute:
Mortise Locks
Electronic:
No
Product Model:
3840S
Product Function:
Privacy/Bed/Bath
Door Thickness Range:
1-3/4" - 2"
Door Strike:
1-1/4" x 4-7/8" ASA strike
Product Category:
Mechanical Locks
Department:
Door Hardware

Hager 3840S US26D – Frequently Asked Questions

1) Will the Hager 3840S privacy mortise lock fit a 2 inch thick door?
Yes. The 3840S covers 1-3/4 inch through 2 inch doors, so a 2 inch leaf is within range. Specify the door thickness on the order if it is greater than 1-3/4 inches, or if the door has an offset prep, because the spindle and thru-bolt lengths are set to the thickness.
2) Will the Hager 3840S drop into an existing ASA strike prep in my frame?
It uses a 1-1/4 x 4-7/8 inch ASA strike, which is the standard commercial frame prep, and the latchbolt throws 3/4 inch. If the frame already has an ASA lip cutout at that size, the strike goes back in the same hole. The door side is the part to check: the mortise pocket must suit a 4-5/16 x 6 x 1 inch lock body at a 2-3/4 inch backset with 3-5/8 inch center to center between the lever and the turn.
3) Does the Hager 3840S privacy lock let staff get in if someone is locked in the restroom?
Yes. The F22 privacy function locks from inside, and the outside has an emergency release operated with the supplied key. That is what makes it usable on a public restroom or a patient room where facilities staff need to get in without drilling the door.
4) Can the Hager 3840S be used on a fire rated door in a hospital or school corridor?
Yes. The 3840S is UL/cUL listed for all functions up to 3 hours on "A" label single doors and carries a UL10C positive pressure rating. It is also BHMA certified to ANSI A156.13, Series 1000, Grade 1, and ADA compliant to ANSI A117.1, which is what a spec on an institutional opening normally calls for.
5) The bathroom door does not need to lock at all - what mortise lock should I use instead of a privacy model?
Use a passage mortise lock. The Schlage PM010 is a Grade 1 passage latch mortise lock, non-keyed, for 1-3/4 inch doors, and the Falcon MA101 is a Grade 1 heavy-duty mortise passage lock with field reversible operation and a fire rating. Both latch the door without any locking function at all. The Hager 3840S carries the privacy function, which holds the door secured from the inside and releases from the outside with the supplied key - that mechanism is what a closet, hall, or storage opening does not need.
6) What is the closest Grade 1 privacy mortise lock to the Hager 3840S from another manufacturer?
The Cal-Royal NM8440 is the closest match. Both are Grade 1 mortise locksets in the privacy/bed/bath function, and both are built for 1-3/4 inch doors - the Hager 3840S covers a 1-3/4 inch to 2 inch door thickness range, while the NM8440 is specified for 1-3/4 inch. The NM8440 is described as a privacy mortise lockset with deadbolt; the 3840S privacy function is F22 with an emergency release on the exterior side operated by a supplied key. If the opening is a standard 1-3/4 inch commercial door and the requirement is simply Grade 1 privacy, either will satisfy it; if the door is thicker than 1-3/4 inch, the 3840S range is the one that covers it.
7) I need to key the door, not just privacy - what mortise lock takes the place of the Hager 3840S?
Move to a keyed function. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series, the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset with an interchangeable core option on 1-3/4 inch doors, and the Cal-Royal NM8050 is a Grade 1 office/entrance mortise lockset with auxiliary deadlatch. The Hager 3840S is non-keyed - its keyed function is listed as non-keyed - so it will not accept a keying schedule for controlled access. If the opening needs to be in a master key system, one of the storeroom or entrance models is the correct swap.
8) Is the Schlage CO-100 privacy mortise lock a drop-in alternative to the Hager 3840S?
They cover the same function but not the same install. The Schlage CO-100-MS-40-KP is a standalone electronic mortise lock in the privacy function, Grade 1 heavy duty, for 1-3/4 inch doors, and it operates through a keypad reader. The Hager 3840S is a mechanical, non-electronic lock. Choosing the CO-100 means committing to code management and the electronics that go with it; the 3840S is a purely mechanical privacy lock with a keyed emergency release on the outside. For an opening where nobody wants to administer user codes, the mechanical lock is the like-for-like choice.
9) For a classroom door, what should I order instead of a Hager 3840S privacy mortise lock?
A classroom-function mortise lock. The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series for 1-3/4 inch doors, and the Cal-Royal NM8070 is a Grade 1 heavy-duty classroom mortise lockset with auxiliary deadlatch, also for 1-3/4 inch doors. The Hager 3840S is a privacy function, which is intended for bed, bath, and similar single-occupant openings rather than for a room where a teacher locks the corridor side while the door stays free to exit.
10) For a behavioral health or patient room, is the Hager 3840S the right privacy lock or is there an anti-ligature option?
There are anti-ligature mortise locksets built for that setting. The TownSteel MRX-L-01 is a Grade 1 heavy duty stainless steel anti-ligature lever mortise lockset in passage function for 1-3/4 inch doors, the MRX-A-01 is the ligature resistant arch trim version in passage function, and the Marks USA 5PDN is a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant. All three are passage function, so they do not lock. The Hager 3840S is a privacy lock with conventional lever trim in Archer, August, Charles, Johnston, Joshua, Louis, Warren, William, and Withnell designs, which suits offices, dorms, and multi-tenant restrooms rather than a ligature-risk opening.
11) The door is a 1-3/8 inch or thinner leaf - what mortise lock fits when the Hager 3840S does not?
Look at the Baldwin 6310, a 2-1/2 inch backset entry/storeroom mortise lock body listed for 1-3/8 inch and over, or the Marks USA 21AC and 22AC ornamental iron mortise locks, both specified for 1 inch doors. The Hager 3840S is built for a 1-3/4 inch to 2 inch door with a 2-3/4 inch backset, so a thinner leaf or a narrow ornamental iron stile calls for one of these instead.
12) For a dormitory room door, is the Hager 3840S or the Sargent 7925 the right mortise lock?
The Sargent 7925 is the dormitory-specific one. It is a Grade 1 heavy duty dormitory exit function mortise lock in the 7900 Series with rose trim and a single cylinder deadbolt, in the corridor/dormitory function. The Hager 3840S is a Grade 1 privacy lock, non-keyed, with a keyed emergency release on the exterior. If the resident needs to key into the room from the corridor, the 7925 covers that; if the room is entered from a suite side that only needs to be secured from within, the 3840S privacy function is the simpler set.
13) Do I have to specify handing when ordering the Hager 3840S mortise lock?
No. The 3840S body is field reversible, so one lock covers left and right hand openings and you can flip it on site. It mounts with concealed thru-bolts, so no screw heads show on the face of the door.
14) Is the Hager 3840S keyed, and does it take a Schlage C keyway cylinder?
The 3840S is a non-keyed privacy lock, so there is no cylinder for everyday entry. The 3800 Series cylinder spec is 6 pin, Schlage C keyway, which is what the keyed functions in the family use. On the 3840S the outside is an emergency release, not a keyed lockset.
15) What finishes and lever styles can I get on the Hager 3840S privacy mortise lock?
Five finishes ship as orderable combinations: 605 bright brass, 606 satin brass, 613 satin bronze oil rubbed, 625 bright chrome and 626 satin chrome, all with the Withnell lever. The 3800 Series lever range covers Archer, August, Charles, Johnston, Joshua, Louis, Warren, William and Withnell, and the exposed trim is cast zinc with a 2-7/16 inch rose. A tactile warning option is available where the code requires knurled trim on a hazardous-area door.
16) What else could I buy instead of the Hager 3840S privacy mortise lock?
The closest cross-brand equivalent is the Cal-Royal NM8440, a heavy duty Grade 1 privacy mortise lockset with deadbolt listed for 1-3/4 inch doors. If your door runs thicker than 1-3/4 inches the Hager is the one that carries the range up to 2 inches. Where the room needs coded access rather than a thumbturn, the Schlage CO-100 standalone electronic mortise lock is a Grade 1 privacy function with a keypad reader on 1-3/4 inch doors.
17) I'm replacing locks across a building. Can I match the Hager 3840S privacy locks to the keyed doors on the same floor?
You can match them visually and dimensionally. The 3840S shares the 3800 Series trim, the same lever designs and the 2-3/4 inch backset with 3-5/8 inch center to center used across the series, and all of them work into the same 1-1/4 x 4-7/8 inch ASA strike prep. Keying is not a factor on the 3840S because it is a non-keyed privacy function; the keyed doors in the series use 6 pin Schlage C keyway cylinders that can be brought into an existing C keyway system.
18) Will an Emtek 3102 Memphis mortise lockset work as a substitute for the Hager 3840S?
No. The Emtek 3102 Memphis is a dummy function mortise entrance lockset, and the same is true of the Emtek 3104 Hamilton, 3106 Manhattan, and 3019 Brisbane. A dummy has no working latch and no locking action - it is trim mounted on a door that is held by something else. The Hager 3840S is an operating Grade 1 privacy mortise lock with a 3/4 inch throw latchbolt and an emergency release. If the door must latch, a dummy is not an alternative regardless of how similar the trim looks.
19) I only need a thumbturn or a deadbolt on the door, not a full privacy lockset - what are the options?
For a deadbolt alone, the Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset in the 4870 Series - the same 2-3/4 inch backset the Hager 3840S uses. The Kaba Ilco 185 Series mortise lock is also a deadbolt function and is supplied with no handing. For thumbturn trim only, the Sargent 130KB is a standard duty mortise thumbturn in the 8200 Series and the 130W is a mortise thumbturn with a round backplate in the 7800 Series. None of these carry a latchbolt the way the 3840S does with its 3/4 inch throw anti-friction latch, so they hold a door closed only when thrown.
20) Does a Schlage PC10 do the same job as the Hager 3840S on a non-keyed opening?
They are different door preps. The Schlage PC10 is a Grade 1 passage cylindrical lock, non-keyed with rose, for 1-3/4 inch doors - a bored prep. The Hager 3840S goes into a mortise pocket, using a 4-5/16 inch x 6 inch x 1 inch chassis with a 1-1/4 inch x 4-7/8 inch ASA strike. Both are non-keyed, but the PC10 is passage rather than privacy and will not drop into a door already cut for a mortise body. Match the existing prep before matching the function.
21) Which privacy mortise locks give me remote or credential control, and how do they differ from the Hager 3840S?
Two carry a privacy function with electronics. The Schlage Electronics LEBMB-ADD is a mobile-enabled mortise lock with push button and LED covering privacy, office, and apartment functions, Grade 2, 3 hour fire rating, for 1-3/4 inch doors. The Schlage CO-100-MS-40-KP is a standalone electronic mortise lock in privacy function, Grade 1 heavy duty, with a keypad reader. The Hager 3840S is BHMA certified to ANSI A156.13 Series 1000 Grade 1 and is non-electronic, so it needs no power, no batteries, and no credential management, and it uses a supplied key for emergency release from the outside.
22) Is a BEST 45H mortise lock body an equivalent order to the Hager 3840S?
Not for a privacy opening, and not as a complete set. The BEST 45HCAC is a heavy duty mortise lock body in the public entrance function, field reversible, in the 45H series, and the 45HCAINL is a heavy duty mortise lockbody with an intruder function. Both are lock bodies, which means trim is ordered separately. The Hager 3840S is a privacy function lock supplied with lever trim - Archer, August, Charles, Johnston, Joshua, Louis, Warren, William, or Withnell - on a 2-7/16 inch rose, and its body is also field reversible.
23) Will a Hager 3840S hold up on a high traffic restroom door in an office building?
That is the duty it is built for. Grade 1 under ANSI A156.13 Series 1000 is the heaviest commercial certification for mortise locks, and the latchbolt is all stainless steel with an anti-friction tongue, which is what keeps a heavy or slightly out of square door latching without dragging. Cast zinc exposed trim on a 2-7/16 inch rose.
24) Is the Hager 3840S an electronic or access control lock?
No, it is a purely mechanical privacy mortise lock with no electronics, no wiring and no credential reader. For a mortise opening that needs credentials, look at electronic mortise locks such as the Dormakaba E-Plex 5086 pushbutton and card lock or the BEST 45HW wired electromechanical mortise lock at 12V/24V.
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Does the Hager 3840S US26D come with a warranty?
Absolutely. The Hager 3840S US26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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