TownSteel MSS Series Double Cy...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$615.00
$610.62
TownSteel TownSteel MSS Series Intruder Latch Bolt Function - Heavy Duty Sectional Mortise Lock , Double Cylinder TWS-MSS-32

TownSteel MSS Series Double Cylinder Mortise Lock with Intruder Function - ANSI Grade 1 Heavy Duty Sectional Trim

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Model: MSS-R-T-32-626
$615.00
$610.62
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$615.00
$610.62
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TownSteel MSS Series Double Cylinder Mortise Lock with Intruder Function - ANSI Grade 1 Heavy Duty Sectional Trim

The TownSteel MSS Series Double Cylinder Mortise Lock delivers ANSI Grade 1 heavy duty security for commercial intruder-function openings. Built with a 2-3/4" backset and a 3/4" projection stainless steel split anti-friction latch bolt, this sectional trim lock is engineered for single opening stand-alone applications or integration into sophisticated access control systems. Forged brass/cast zinc lever components, a stainless steel strike, and a brass escutcheon combine for dependable, long-term commercial performance.

Key Features

  • Backset: 2-3/4" backset provides standard commercial door preparation.
  • Latch Bolt: 3/4" projection, stainless steel, split, anti-friction design resists manipulation and ensures smooth operation.
  • Faceplate: 1-1/4" x 8" stainless steel faceplate for durable, corrosion-resistant performance.
  • Escutcheon: 10-9/16" x 2-3/8" x 9/32" brass escutcheon for a secure, finished trim appearance.
  • Lever Construction: Forged brass/cast zinc lever, plated to match finish symbols, for heavy-duty commercial durability.
  • Guard Bolt and Strike: Stainless steel guard bolt paired with a plated/stainless steel ANSI strike for reinforced security.
  • Thumb Turn and Stop Works: Brass Classic Visible thumb turn and stainless steel rocker-type stop works for reliable operation.
  • Access Control Ready: Supports optional status sensors including REX (request-to-exit), PRIV (privacy), DAJ (door ajar), and MKO (mechanical key override) for system integration.

Certifications & Compliance

  • ANSI Grade 1 Heavy Duty Rated
  • 2-Year Manufacturer's Warranty

Technical Specifications

  • Series: MSE Series
  • Product Group: Mechanical Locks
  • Product Subgroup: Mortise Locks and Trim
  • Product Type: Mortise Locks
  • Subcategory: Mortise Locks
  • Keyed Function: Double Cylinder
  • Commercial/Residential: Commercial
  • Keyed: Yes
  • Lock Function: Double Cylinder
  • Product Attribute: Mortise Locks
  • Electronic: No
  • Product Function: Intruder
  • Product Category: Mechanical Locks
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why TownSteel MSS?

TownSteel MSS Series mortise locks are built to ANSI Grade 1 heavy duty standards with stainless steel latch bolts, guard bolts, and faceplates for long-term commercial reliability. The forged brass/cast zinc lever construction and sectional trim design deliver professional-grade performance for demanding door openings, whether installed as a stand-alone lock or integrated into a broader access control system.

Product Specs

Series:
MSE Series
Product Group:
Mechanical Locks
Product Subgroup:
Mortise Locks and Trim
Product Type:
Mortise Locks
Subcategory:
Mortise Locks
Keyed Function:
Double Cylinder
Commercial/Residential:
Commercial
Lock Type:
Mortise
Keyed:
Yes
Lock Function:
Double Cylinder
Grade:
Grade 1
Duty Level:
Heavy Duty
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Intruder
Product Category:
Mechanical Locks
Department:
Door Hardware

TownSteel MSS-R-T-32-626 – Frequently Asked Questions

1) What does the intruder function on the TownSteel MSS Series mortise lock actually do?
The MSS intruder function is a double cylinder lock, meaning it is keyed on both sides. Staff can lock the door from inside the room with a key without stepping into the corridor, which is why this function gets specified for classroom and office lockdown. The latch bolt retracts by lever when unlocked. It is a mechanical lock, not electronic, so it keeps working regardless of power or network.
2) Will the MSS mortise lock drop into an existing 2-3/4 inch backset mortise pocket with an ANSI strike?
Yes on both counts. The MSS uses a 2-3/4 inch backset, the standard commercial mortise backset, and ships with an ANSI strike in plated or stainless steel. The faceplate is 1-1/4 by 8 inches stainless steel, which matches the standard ANSI mortise prep. The latch bolt projects 3/4 inch, stainless steel, split and anti-friction, so it reaches a standard ANSI strike lip. TownSteel publishes an MSS template if you want to check the pocket before you cut.
3) Do I have to specify handing when ordering the TownSteel MSS mortise lock?
Handing is required at order. Four choices: LH, RH, LHR, and RHR. Reverse handing (LHR/RHR) applies to outswing doors. Get it wrong and the lever and latch orientation will not suit the opening, so confirm which way the door swings and which side you stand on from the outside before you place the order.
4) Can I key a batch of these TownSteel MSS locks alike across a building?
Yes. Keying is a required selection: KD (keyed different, the standard), KA (keyed alike for multiple locks on one key), or a specific key code for special keying. If you are standardizing a floor or a wing, choose KA and order the whole batch together so they are cut to the same key. There is also an SFIC prep, less core version if your facility already runs small format interchangeable cores and your locksmith will supply the cores.
5) What is the closest equivalent to the TownSteel MSS intruder mortise lock from another manufacturer?
The BEST 45HCAINL mortise lockbody is the nearest match by function: it is a heavy duty mortise lockbody built for the intruder function, the same function the TownSteel MSS Series intruder lock performs. The TownSteel MSS is supplied as a complete Grade 1 heavy duty sectional mortise lock with double cylinder keyed function, sectional escutcheon trim in low or regular height, and a choice of Artistic, Congr, Gala, Imperial, Quest, Regal, Sentinel or Tango levers. The BEST 45HCAINL is identified as a lockbody, so trim is specified separately.
6) How does the TownSteel MSS compare to the Corbin Russwin ML2003 for a school corridor door?
The Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series for 1-3/4 inch doors, keyed on the corridor side in classroom function. The TownSteel MSS Series intruder lock is a Grade 1 heavy duty mortise lock with double cylinder keyed function, letting the door be locked with a key from the classroom side as well. Both are mortise-prepped Grade 1 locks; the difference is where the key control sits.
7) What is the difference between the SFIC prep and standard cylinder versions of the MSS lock?
Standard ships ready to run TownSteel's own cylinder. The SFIC prep version comes less core, prepped to accept a small format interchangeable core that you supply, which is how most schools, hospitals and large MRO operations keep every opening on one master system and rekey without pulling the lock. Because it is a double cylinder intruder function, remember you need cores for both sides.
8) What size is the escutcheon on the TownSteel MSS sectional mortise lock and will it cover an old trim footprint?
The MSE escutcheon measures 10-9/16 x 2-3/8 x 9/32 inches and is brass, plated to match the finish. It comes in two heights, MSE Low and MSE Regular. That is a narrow plate, so if you are replacing wider rose or escutcheon trim you may see witness marks or old fastener holes on the door face. Match the existing trim outline against those dimensions before you pull the old lock.
9) What finishes and lever styles can I get on the TownSteel MSS mortise lock to match the rest of my doors?
Seven finishes: 605 bright brass, 606 satin brass, 622 matte black, 625 bright chrome, 626 satin chrome, 629 bright stainless and 630 satin stainless. Levers come in eight styles, Artistic, Congr, Gala, Imperial, Quest, Regal, Sentinel and Tango, in forged brass or cast zinc plated to match the finish symbol. For a commercial corridor, 626 satin chrome and 630 satin stainless are the two that usually match existing hardware.
10) Is the TownSteel MSS mortise lock heavy duty enough for a school or hospital corridor?
It is an ANSI Grade 1 heavy duty commercial mortise lock, which is the top durability tier and what institutional specs normally call for on high traffic openings. Wear parts are stainless steel: latch bolt, guard bolt, faceplate, and rocker type stop works. The escutcheon and thumb turn are brass.
11) I need a classroom function mortise lock, not intruder. What else is available?
The MSS in this configuration is a double cylinder intruder function. If you need a true classroom function, the Corbin Russwin ML2003 is a Grade 1 classroom mortise lockset for 1-3/4 inch doors, and the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch, also for 1-3/4 inch doors. For classroom security with a visual indicator, the Marks USA LA318GJ is a Grade 1 indicator mortise lockset with ANSI strike.
12) Is there another brand with an intruder function mortise lock if I am standardized on a different manufacturer?
BEST makes one. The 45HCA heavy duty mortise lock body carries the intruder function as well, so if your facility already runs BEST cores and lock bodies you can keep the intruder function without switching brands. Otherwise the TownSteel MSS gives you the same function as a complete sectional trim lockset with the lever and escutcheon included.
13) Can I get the MSS mortise lock with request-to-exit or door ajar monitoring?
Optional status sensors are offered on the series: REX (request to exit), PRIV (privacy), DAJ (door ajar) and MKO (mechanical key override). These are the contacts an access control integrator uses to report door position and egress back to the panel. The lock itself is mechanical, so the sensors monitor rather than drive the locking.
14) We need an electrified mortise lock tied to access control rather than the mechanical TownSteel MSS. What are the options?
The TownSteel MSS Series is a mechanical mortise lock. For hardwired electrified mortise, the Schlage L9092EU with 03A trim is a heavy duty mortise lock with electric lock/unlock outside lever, keyed outside, request to exit, at 12/24VDC for 1-3/4 inch doors. The Command Access ML190 is a heavy-duty motorized mortise lock with field selectable EL/EU operation at 24VDC in storeroom function, and the BEST 45HW is a heavy duty wired electromechanical mortise lock running 12V or 24V.
15) Is the Cal-Royal NM8070 a substitute for the TownSteel MSS intruder lock?
They are different functions. The Cal-Royal NM8070 is a heavy duty Grade 1 classroom mortise lockset with an auxiliary deadlatch, for 1-3/4 inch doors, keyed from the outside only in the classroom function. The TownSteel MSS Series intruder lock is a Grade 1 heavy duty mortise lock with a double cylinder keyed function, meaning a key cylinder on both sides so the room can be secured from within. If the specification calls for intruder or double cylinder operation, the NM8070 will not meet it.
16) What is the alternative if we want keypad or credential access instead of the TownSteel MSS mechanical intruder lock?
The TownSteel MSS Series mortise lock is a mechanical, non-electronic Grade 1 lock. For credential-based access on a mortise prep, the Schlage Electronics LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125kHz proximity reader and mobile-enabled deadbolt with LED, carrying a 3 hour fire rating, supplied right hand with Greenwich trim. The Alarm Lock DL3500CR is a Grade 1 electronic mortise lock with 300 user codes in classroom function for doors 1-5/8 to 1-7/8 inch thick.
17) We only need double cylinder key control on the door, not a lever lockset. What is simpler than the TownSteel MSS?
The Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset, keyed from both sides with no lever or latch operation. The TownSteel MSS Series intruder lock also uses a 2-3/4 inch backset, but adds a 3/4 inch projection stainless steel split anti-friction latch bolt, a stainless steel guard bolt, and sectional lever trim, so it handles latching and door operation as well as key control.
18) Can I use a Schlage PM010 in place of the TownSteel MSS intruder mortise lock?
No. The Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, so it has no key cylinder and no locking at all. The TownSteel MSS Series intruder lock is keyed, with a double cylinder function taking a cylinder on each side, and is offered either in standard cylinder form or with SFIC prep less core.
19) We standardize on storeroom function mortise locks. How does that compare to the TownSteel MSS intruder lock?
Storeroom peers include the Accentra 8805FL, a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080, a heavy duty Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. Storeroom keeps the outside lever locked at all times with key entry. The TownSteel MSS Series intruder lock is a Grade 1 heavy duty mortise lock with double cylinder keyed function, which puts a cylinder on both faces so the occupant side can also be keyed.
20) Is a Baldwin 6301LS mortise lock body an alternative to the TownSteel MSS?
They suit different openings. The Baldwin 6301LS is an entry/apartment lever by lever mortise lock body with a 2-1/2 inch backset for doors 1-3/4 inch and over. The TownSteel MSS Series intruder lock uses a 2-3/4 inch backset with a 1-1/4 by 8 inch stainless steel faceplate and an ANSI plated or stainless steel strike, so the door prep and strike cutout differ from the Baldwin. Backset must match the existing mortise pocket.
21) What mortise lock should we use for a patient or behavioral health door where the TownSteel MSS is not appropriate?
Look at the Marks USA 5PDN, a Grade 1 hospital passage mortise push/pull paddleset that is ligature resistant and ADA compliant in satin stainless steel. The TownSteel MSS Series intruder lock is a keyed Grade 1 heavy duty commercial mortise lock with lever trim in styles such as Sentinel, Regal and Tango and a brass thumb turn, which is a different trim approach than a paddle.
22) For an aluminum storefront door, can I use the TownSteel MSS mortise lock?
The TownSteel MSS Series is a heavy duty sectional mortise lock with a 2-3/4 inch backset, a 1-1/4 by 8 inch faceplate and a 10-9/16 inch escutcheon, dimensions suited to standard commercial mortise prep rather than narrow storefront stiles. For storefront work, the Alarm Lock DL1300NW is a Trilogy Networx wireless electronic mortise lock with keypad made for Adams Rite deadlatches, and the Kaba Ilco BR Series is a glass door bottom rail lock.
23) Is the Hager 3850E a comparable mortise lock to the TownSteel MSS?
The Hager 3850E is a 3800 Series Grade 1 office mortise lock with lever and escutcheon, non-keyed, on a 2-3/4 inch backset for doors 1-3/4 to 2-1/2 inch. It shares the 2-3/4 inch backset and escutcheon trim style with the TownSteel MSS Series, but the MSS is keyed with a double cylinder function and offers a choice of low or regular escutcheon height plus SFIC prep less core.
24) What is sectional trim on the MSS and how is it different from a full escutcheon lock?
Sectional trim means the lever and the cylinder or thumb turn mount on their own plate sections rather than one continuous full length escutcheon. On the MSS that plate measures 10-9/16 x 2-3/8 x 9/32 inches in brass, available in a low or regular height. It leaves a smaller footprint on the door face and is easier to align on doors with limited stile room than a full escutcheon design.
25) Does the Falcon MA101 work as a lower-cost version of the TownSteel MSS mortise lock?
The Falcon MA101 is a Grade 1 heavy-duty mortise lock in the MA Series with passage function, fire rated, and field reversible. Passage function means no key and no locking. The TownSteel MSS Series intruder lock is keyed with a double cylinder function, so the MA101 is only a candidate on openings that need latching without security.
26) What is a mortise lock for a residential-style ornamental iron door instead of the TownSteel MSS?
The Marks USA 21AC and 22AC are entrance double cylinder ornamental iron mortise locks with a round knob, built for 1 inch thick doors. They share the double cylinder keying approach with the TownSteel MSS Series intruder lock, but the MSS is a commercial Grade 1 heavy duty lockset with sectional lever trim and a brass escutcheon measuring 10-9/16 by 2-3/8 by 9/32 inch.
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Does the TownSteel MSS-R-T-32-626 come with a warranty?
Absolutely. The TownSteel MSS-R-T-32-626 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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