Omnia 12198 Solid Brass Mortis...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$732.73
Omnia Omnia 12198 Mortise Knob Lockset With Plates, 10 9/16" Overall, 2 3/8" Dia. Knob, 3 1/4" Projection OMN-12198

Omnia 12198 Solid Brass Mortise Knob Lockset with Plates

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Model: 12198/A26D
$732.73
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In Stock (leaves warehouse same day if ordered before 3pm ET)

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Omnia 12198 Solid Brass Mortise Knob Lockset with Plates

The Omnia 12198 solid brass mortise knob lockset delivers professional-grade security and durability for residential applications. This complete lockset features a 10 9/16" overall length with 2 3/8" diameter knobs and 3 1/4" projection, constructed from solid brass for lasting performance. Available in multiple finish options including US10B, US14, US15, US26, and US26D, this mortise design provides superior security and durability compared to standard bored locks, making it an excellent choice for residential entry and interior security applications.

Key Features

  • Precise Dimensions: 10 9/16" overall length with 2 3/8" diameter knobs and 3 1/4" projection for proper fit and operation.
  • Solid Brass Construction: Premium solid brass materials provide exceptional durability and corrosion resistance for long-term reliability.
  • Complete Mortise Design: Full mortise lockset configuration with plates included for a comprehensive door security solution.
  • Multiple Finish Options: Available in US10B, US14, US15, US26, and US26D finishes to match existing hardware and architectural requirements.
  • Professional Installation: Mortise lock design provides superior security and durability compared to standard bored locks.
  • Residential Grade Quality: Engineered specifically for residential applications with appropriate security and aesthetic features.

Technical Specifications

  • MAP Policy: Yes
  • Commercial/Residential: Residential
  • Department: Door Hardware
  • Handle Type: Knob
  • Lock Type: Mortise
  • Product Category: Mechanical Locks
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • Product Type: Mortise Locks
  • Subcategory: Deadbolts

Typical Applications

  • Residential Entry Doors
  • Private Office Doors
  • Interior Security Applications
  • Custom Home Construction
  • Residential Renovation Projects
  • Multi-Unit Residential Properties
  • High-End Residential Developments

Why Omnia 12198?

Omnia mortise locksets deliver residential-grade reliability with solid brass construction engineered for demanding residential applications where dependable performance and aesthetic appeal are essential. The precision 10 9/16" overall dimensions, 2 3/8" diameter knobs, and 3 1/4" projection, along with multiple finish options, ensure proper fit and architectural compatibility for discerning homeowners and builders seeking a comprehensive mortise lock solution with plates included.

Manufacturer Resources

Omnia 2026 Door Hardware Catalog

Product Specs

Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Mortise Locks
Subcategory:
Deadbolts
Commercial/Residential:
Residential
Lock Type:
Mortise
Handle Type:
Knob
MAP Policy:
Yes
Product Category:
Mechanical Locks
Department:
Door Hardware

Omnia 12198/A26D – Frequently Asked Questions

1) Is the Omnia 12198 mortise lockset handed, and how do I order the right hand?
Handing is required at the time of order. The 12198 is built left handed or right handed, so it is not reversible in the field. Stand outside the door, on the side that swings away from you: if the hinges are on your left it is left handed, hinges on your right it is right handed. On a pair of doors you will be ordering one of each.
2) Which function should I order on an Omnia 12198 knob lockset for a bedroom, a front door, or a closet?
Nine functions are built on the 12198. Bedroom or bath takes Privacy. A front entry takes Standard, or Double Cylinder where there is glass near the lock and you want a key required on the inside too. Closets and halls take Passage, which never locks. Storeroom keeps the outside knob locked at all times with the key operating it. Classroom is locked and unlocked by key from the outside. Panic-Proof lets the inside knob retract everything in one motion for egress. Single Dummy and Pair Dummy are pull-only, no latch, for inactive leaves and false doors.
3) How much room does the Omnia 12198 knob need on the door face and how far does it stick out?
The 12198 measures 10 9/16 inches overall with a 2 3/8 inch diameter knob and 3 1/4 inch projection. The overall length is the plate, so you need that much clear vertical run on the stile, and the plate hides the old mortise cutout only if that cutout is shorter. The 3 1/4 inch projection is the one to watch on a door that swings back against a wall or into a narrow return, and on a pair of doors with knobs facing each other.
4) Is the Omnia 12198 a commercial Grade 1 mortise lock, or is it residential?
Residential. The 12198 is a solid brass mortise knob set built for houses, apartments, and private offices, not for a code-driven commercial opening. If you are specifying to a Grade 1 requirement for a school, hospital, or institutional corridor, this is the wrong part and you want something like the Corbin Russwin ML2003 classroom mortise lock or the Cal-Royal NM8080 storeroom mortise, both Grade 1. For a Grade 1 passage on a 1-3/4 inch door, the Falcon MA101 covers it.
5) I have knobs on the other doors in the building. Can I match the Omnia 12198 across all of them?
Five finishes run across the 12198: Black Oil-Rubbed, Polished Chrome Plated, Polished Nickel Plated, Satin Chrome Plated, and Satin Nickel Plated. The catalogue also states US10B, US14, US15, US26, and US26D, which are the same five in trade codes. Because every function shares the same plate and 2 3/8 inch knob, you can run Privacy on the bedrooms, Passage on the closets, and Standard on the entry and have them all read identically down a hallway. Pick the finish once and hold it across the whole order.
6) I need a mortise lockset with a lever instead of a knob - what takes the place of the Omnia 12198?
The Omnia 12198 is a knob lockset, so a lever opening needs a different part. The Baldwin 6301LS is the lever by lever version of the same entry/apartment mortise lock body at a 2-1/2 inch backset, and the Baldwin 6310190RRLS is a lever by lever entrance/storeroom mortise lock at a 2-1/2 inch backset in right hand reverse. For a lever with an escutcheon plate rather than a rose, the Hager 3810E is a 3800 Series passage mortise lock with escutcheon at a 2-3/4 inch backset.
7) The Omnia 12198 is residential - what do I use on a commercial or institutional door instead?
The Omnia 12198 is built for residential applications. For a commercial opening, the Cal-Royal NM series covers the common functions as heavy duty Grade 1 mortise locksets for 1-3/4 inch doors: NM8050 office/entrance with auxiliary deadlatch, NM8070 classroom, NM8080 storeroom with interchangeable core option, and NM8440 privacy with deadbolt. The Corbin Russwin ML2003 is a Grade 1 classroom mortise lockset in the ML2000 Series for 1-3/4 inch doors, and the Sargent 7925 is a Grade 1 heavy duty corridor/dormitory mortise lock with rose trim and a single cylinder deadbolt.
8) Does the Omnia 12198 carry an ANSI/BHMA Grade 1 rating, and what should I specify if my facility requires one?
The Omnia 12198 is a solid brass residential lockset. When a Grade 1 mortise lock is required by spec, Grade 1 peers include the Accentra 8805FL storeroom mortise lock in the 8800 Series with an Arcadia lever, the Falcon MA101 heavy duty mortise passage lock with field reversible operation, the Cal-Royal NM8080 storeroom, and the Marks USA LA318GJ classroom security indicator mortise lockset with ANSI strike and steel escutcheon. The Falcon MA101 is also fire rated, which matters on a rated corridor door.
9) What looks like a substitute for the Omnia 12198 but will not work in the same door prep?
Two categories get mistaken for it. First, mortise deadbolts: the Sargent 4874 is a double cylinder mortise deadbolt at a 2-3/4 inch backset and the Kaba Ilco 185 Series is a no-handing mortise deadbolt - both are deadbolt-only bodies with no knob or latch, so neither replaces a complete knob lockset even though the Omnia 12198 offers a double cylinder function. Second, cylindrical locks: the Schlage PC10 is a Grade 1 passage cylindrical lock with rose for 1-3/4 inch doors, which goes into a bored door prep, not a mortise pocket. Mortise trim accessories such as the Sargent 130KB and 130W thumbturns are components, not locksets.
10) Is there a mortise option for a behavioral health or hospital door where the Omnia 12198 knob would be a ligature risk?
The Omnia 12198 uses a 2 3/8 inch diameter solid brass knob, which is a graspable projection. For anti-ligature openings, TownSteel makes the MRX-A-01 in passage function with a satin stainless steel ligature resistant arch trim and the MRX-L-01 as a stainless steel Grade 1 heavy duty anti-ligature lever, both heavy duty for 1-3/4 inch doors. 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.
11) What is the difference between a mortise knob lockset like the Omnia 12198 and a regular bored knob lock?
A bored lock drops into a round cross bore through the face of the door. The 12198 needs a rectangular pocket routed into the door edge, with the lock body living inside the stile. That is a lot more prep, and it is why you would not switch a door from bored to mortise casually. What you get is a bigger lock case with a longer plate that carries the knob, and a stiffer feel over years of use. If the doors are already prepped for bored locks and you just want a Grade 1 passage function, a cylindrical unit like the Schlage PC10 is the simpler swap.
12) Do I need to order the plates and knobs separately with the Omnia 12198, or is it a complete set?
It ships complete. The 12198 is a full mortise lockset with the plates included, knobs both sides, so you are not buying a lock body and trim as two line items. Contrast that with something like the Baldwin 6301 or the BEST 45H series, which are sold as mortise lock bodies and need trim specified on top.
13) What do I order for the inactive leaf of a pair of doors alongside an Omnia 12198?
Pair Dummy is the function for that. It gives you knobs and plates on both faces with no working latch, so the inactive leaf matches the active one visually while the active leaf carries the real lock. Single Dummy is the one-sided version for a false door or a surface-mounted application. Both come in the same five finishes as the working functions, so the pair reads as one set.
14) I need a keyed mortise entry set in solid brass but with levers instead of knobs. What else is there?
The 12198 is knob by knob only, both sides. For a lever mortise body in the same residential vein, the Baldwin 6301LS is an entry/apartment lever by lever on a 2-1/2 inch backset, which matches one of the two backsets the Omnia offers, and the Baldwin 6310190RRLS is an entry/storeroom lever set on the same 2-1/2 inch backset. On the decorative side, Emtek builds mortise entrance sets in the Brisbane, Memphis, Hamilton, and Manhattan patterns.
15) I only need a non-functioning knob on one side of the door - is the Omnia 12198 the wrong part?
The Omnia 12198 does include dummy configurations, in both single dummy and pair dummy, so it covers a non-latching application in solid brass. If you want a dummy in a different design family, Emtek offers mortise entrance dummy locksets in several patterns - the 3019 Brisbane, 3102 Memphis, 3104 Hamilton, and 3106 Manhattan. For a lever half dummy on a commercial door, the Schlage L0170 is a Grade 1 heavy duty non-keyed mortise half dummy trim in the L Series for 1-3/4 inch doors.
16) Can I get the Omnia 12198 with a keypad or card reader, or do I need a different lock?
The Omnia 12198 is a mechanical lock and is operated by key and knob. Keyless mortise options are separate products: the Alarm Lock DL3500CR Trilogy is a Grade 1 electronic mortise lock with 300 user codes in classroom function for 1-5/8 to 1-7/8 inch doors, the Alarm Lock DL2700CR Trilogy T2 is a Grade 1 classroom electronic mortise lock with a weatherproof design over the same door thickness range, and the Dormakaba E-Plex 2066 is an electronic pushbutton keyless mortise lock for wide stile doors. For credential-based access, the Accentra nexTouch NTM623-NR adds a capacitive touchscreen keypad with cylinder override, and the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID for 1-3/4 inch doors.
17) I need a passage-only mortise latch and do not want to pay for a keyed lockset - what is simpler than the Omnia 12198?
The Omnia 12198 does include a passage function, but if you want a stripped-down passage mortise part the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock in the PM Series for 1-3/4 inch doors. The Hager 3810S is a 3800 Series passage mortise lock with a rose at a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors, and the Hager 3810E is the same lock with an escutcheon. The Falcon MA101 is a Grade 1 heavy duty passage mortise lock that is field reversible and fire rated.
18) The Omnia 12198 is offered in a privacy function - what else covers a bed or bath door?
The Omnia 12198 includes a privacy function in its solid brass knob format. On the commercial side, the Cal-Royal NM8440 is a heavy duty Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Hager 3840S is a 3800 Series Grade 1 privacy mortise lock at a 2-3/4 inch backset for 1-3/4 to 2 inch doors. If the privacy door needs electronic control, the Schlage CO-100 is a Grade 1 heavy duty standalone electronic mortise lock in privacy function with a keypad reader for 1-3/4 inch doors.
19) My door is an ornamental iron or narrow stile frame - will the Omnia 12198 fit, and what else should I look at?
The Omnia 12198 is a residential mortise knob lockset with a 10 9/16 inch overall case and 3 1/4 inch projection, sized for a conventional door stile. For ornamental iron, the Marks USA 21AC and 22AC are entrance double cylinder mortise locks with a round knob built for 1 inch thick doors. For a glass door bottom rail, the Kaba Ilco BR Series is the bottom rail lock. Aluminum storefront with Adams Rite deadlatch prep is a different animal again - the Alarm Lock DL1300NW Trilogy Networx wireless electronic mortise lock with keypad is made for that prep.
20) Can the Omnia 12198 be tied into an access control system or an electric strike circuit?
The Omnia 12198 is a mechanical mortise lockset with knobs and plates. Electrified mortise locks are built differently: the BEST 45HW Series is a heavy duty wired electromechanical mortise lock running 12V or 24V, the Command Access ML190 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 with 03A trim is a heavy duty corridor mortise lock with an electrically controlled outside lever, keyed outside, request to exit, at 12/24VDC on 1-3/4 inch doors. For wireless credential systems, the Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and Greenwich trim in right hand.
21) Does the Omnia 12198 need to be ordered by hand, or is there a mortise lock that avoids handing?
The Omnia 12198 is ordered left handed or right handed, so the opening has to be handed before you buy. If you stock across many doors and want to avoid handing errors, the Kaba Ilco 185 Series mortise lock is specified as no handing, the BEST 45HCAC heavy duty public entrance mortise lock body is field reversible, and the Falcon MA101 Grade 1 passage mortise lock is field reversible as well.
22) Will the Omnia 12198 hold up in a rental unit or an apartment turnover?
Solid brass throughout, which is why it survives repeated turnover better than a plated pot-metal knob, and brass does not corrode in a coastal or humid corridor. It is rated for residential duty, so it suits multi-unit residential, entry doors, and private offices. For a high-traffic shared corridor or laundry room in the same building, step up to a Grade 1 body such as the Cal-Royal NM8050 office/entrance mortise with auxiliary deadlatch.
23) Can I get keyless or keypad entry in place of the Omnia 12198 mortise lockset?
No, the 12198 is purely mechanical, keyed on the Standard, Double Cylinder, Storeroom, and Classroom functions. If the requirement is code entry on a mortise prep, the Alarm Lock DL2700CR Trilogy is a classroom-function electronic mortise for 1-5/8 to 1-7/8 inch doors, and the Dormakaba E-Plex 2066 is a pushbutton keyless mortise lock. Both are a different door prep and a different look than a solid brass knob set, so do not plan on swapping one for the other on the same opening without checking the pocket.
How fast can I get the Omnia 12198/A26D delivered?
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Can I return it if it doesn’t work for me?
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Does the Omnia 12198/A26D come with a warranty?
Absolutely. The Omnia 12198/A26D is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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