TownSteel MSS Series ANSI Grad...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$529.00
$525.22
TownSteel TownSteel MSS Series Classroom Function - Heavy Duty Sectional Mortise Lock , Single Cylinder TWS-MSS-05

TownSteel MSS Series ANSI Grade 1 Heavy Duty Sectional Mortise Lock, Classroom Function, Single Cylinder

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Model: MSS-R-T-05-605
$529.00
$525.22
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$529.00
$525.22
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TownSteel MSS Series ANSI Grade 1 Heavy Duty Sectional Mortise Lock, Classroom Function, Single Cylinder

The TownSteel MSS Series is an ANSI Grade 1 heavy duty motorized mortise lock built for single opening, stand-alone use or integration into access control systems. This single cylinder, classroom function lock features a 2-3/4" backset, a 3/4" projection stainless steel split anti-friction latch bolt, a 1-1/4" x 8" stainless steel faceplate, and a 10-9/16" x 2-3/8" x 9/32" brass escutcheon, backed by TownSteel's 2-year manufacturer's warranty.

Key Features

  • Precision Trim Dimensions: 2-3/4" backset with a 1-1/4" x 8" stainless steel faceplate and 10-9/16" x 2-3/8" x 9/32" brass escutcheon for accurate door preparation.
  • Heavy-Duty Latch Bolt: 3/4" projection, stainless steel, split, anti-friction latch bolt for smooth, reliable latching performance.
  • Reinforced Guard Bolt: Stainless steel guard bolt adds an added layer of tamper resistance.
  • Durable ANSI Strike: Plated/stainless steel ANSI strike supports long-term, high-traffic reliability.
  • Forged Lever Construction: Forged brass/cast zinc lever parameters, plated to match finish symbols, for commercial-grade strength.
  • Thumb Turn & Stop Works: Brass Classic Visible thumb turn standard with a stainless steel, rocker-type stop works mechanism.
  • Access Control Ready: Optional status sensors - REX (request-to-exit), PRIV (privacy), DAJ (door ajar), and MKO (mechanical key override) - enable integration into access control systems.

Certifications & Compliance

  • ANSI Grade 1 Heavy Duty Mortise Lock
  • 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: Single Cylinder
  • Commercial/Residential: Commercial
  • Keyed: Yes
  • Lock Function: Single Cylinder
  • Product Attribute: Mortise Locks
  • Electronic: No
  • Product Function: Classroom
  • Product Category: Mechanical Locks
  • Department: Door Hardware

Typical Applications

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

Why TownSteel MSS?

TownSteel MSS Series mortise locks combine stainless steel latch bolts, guard bolts, and faceplates with forged brass/cast zinc levers for ANSI Grade 1 heavy duty reliability in classroom and institutional door openings. Built for single-opening or access-control-integrated applications, the MSS Series delivers professional-grade security and dependable, commercial-rated durability.

Product Specs

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

TownSteel MSS-R-T-05-605 – Frequently Asked Questions

1) Will the MSS classroom mortise latch into the strike plate already in my frame?
The latchbolt throws 3/4 inch and is a split, anti-friction stainless bolt, with a separate stainless guard bolt for deadlatching. A 3/4 inch throw is the normal commercial mortise projection, so it will engage an existing ANSI-prepped strike in most cases. If your frame has a non-ANSI or older proprietary strike cutout, use the ANSI strike supplied with the lock instead.
2) How does classroom function work on this TownSteel mortise lock, and is it the right function for a school door?
Classroom function on the MSS means the outside lever is locked and unlocked by key from the outside only, and the inside lever always retracts the latch for free egress. There is no inside thumbturn control of the outside lever, so a teacher has to step into the corridor to lock up. If your district requires locking from inside the room, you want a classroom security or intruder function instead, such as the BEST 45HCA intruder lockbody or the Marks USA LA318GJ classroom security indicator lockset.
3) Do I have to specify handing when ordering the TownSteel MSS mortise lock?
Yes, handing is required. The MSS is ordered as LH (left hand), RH (right hand), LHR (left hand reverse), or RHR (right hand reverse). Stand outside the door on the key side: the hinge side gives you left or right, and reverse means the door swings toward you. Getting this wrong on a mortise body means the lever and latch face the wrong way, so confirm it before you place the order.
4) Can I get the TownSteel MSS keyed alike with the other locks in my building?
Keying is specified at order time on the MSS. You choose KD (keyed different, the standard), KA (keyed alike across multiple locks), or a special key code, with a field for the code itself. Property managers standardizing a corridor or a floor typically order KA across the group. There is also a cylinder choice: standard cylinder, or SFIC prep less core if your facility already runs small format interchangeable cores and you want to load your own.
5) I need classroom function with keypad access instead of a key - what should I use?
For keypad control on a classroom opening, the Alarm Lock DL2700CR Trilogy T2 is a Grade 1 electronic mortise lock with classroom function for doors 1-5/8 to 1-7/8 inch, and the DL3500CR is a Grade 1 Trilogy classroom electronic mortise lock holding 300 user codes. The TownSteel MSS Series classroom lock is keyed and non-electronic, operating on a single cylinder with a mechanical thumb turn.
6) What is a direct mechanical equivalent to the TownSteel MSS Series classroom mortise lock from another brand?
The Cal-Royal NM8070 is a Grade 1 heavy duty classroom function mortise lockset built for 1-3/4 inch doors, and the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset in the ML2000 Series, also listed for 1-3/4 inch doors. Both match the MSS Series on Grade 1 classroom function in a mechanical, non-electronic mortise lock. The MSS is supplied with sectional trim and a 2-3/4 inch backset, with a 1-1/4 inch by 8 inch stainless faceplate and ANSI strike.
7) Which mortise lock should I specify if the opening has to tie into an access control system?
For access control, the Command Access ML190 is a heavy duty motorized mortise lock with field selectable EL/EU operation on 24VDC, the BEST 45HW is a wired electromechanical mortise lock running 12V or 24V, and the Schlage L9092EU with 03A trim is a heavy duty electric lock/unlock outside lever mortise lock with request to exit, keyed outside, at 12/24VDC for 1-3/4 inch doors. The TownSteel MSS Series is a mechanical Grade 1 classroom lock, though it is offered with optional status sensors including REX, privacy, door ajar, and mechanical key override for integration.
8) We use small format interchangeable cores across the campus - does the MSS Series work, or should we look at another brand?
The TownSteel MSS Series is offered with an SFIC prep, less core cylinder option alongside the standard cylinder, so it can be fitted to an existing small format interchangeable core system. If you are comparing, the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset with an interchangeable core option, though that one is storeroom rather than classroom function.
9) What are the credential-reader mortise options if we want cards or mobile access on classroom doors?
For credential reading, the Dormakaba Saffire LX-I-M002 is an electronic RFID mortise lockset with BLE mobile access at BHMA Grade 2, the Schlage LEMD-GRW is a Grade 1 ENGAGE Series wireless mortise lock with a 125 kHz proximity reader and a 3 hour fire rating, and the Dormakaba E-Plex E5086 is a Grade 1 pushbutton and card back-to-back mortise lock. The TownSteel MSS Series is a mechanical keyed Grade 1 classroom lock and is prepared for integration into access control systems, with optional mechanical key override and request-to-exit sensors.
10) Is the TownSteel MSS mortise lock heavy enough for a high traffic commercial corridor?
It is an ANSI Grade 1 heavy duty commercial mortise lock, which is the top durability grade and the usual specification for schools, healthcare, and other high traffic institutional openings. Wear parts are stainless where it counts: split anti-friction latchbolt, guard bolt, faceplate, and rocker type stop works. Levers are forged brass or cast zinc, plated to match the finish.
11) What is the difference between sectional trim and escutcheon trim on the TownSteel MSS, and which escutcheon do I pick?
The MSS is a sectional trim mortise lock, meaning the lever mounts on its own rose-style section rather than one full plate, which is the cleaner look on a narrow face. Two escutcheon options are offered, MSE Low and MSE Regular. Pick based on the cutout already in your door leaf and the look on the adjacent openings; the brass escutcheon runs 10-9/16 x 2-3/8 x 9/32 inches.
12) What are the alternatives to the TownSteel MSS if I need a different function on the same mortise prep?
Stay in Grade 1 mortise and change the function. For a storeroom opening where the outside lever is always locked, the Cal-Royal NM8080 or the Accentra 8805FL are Grade 1 storeroom mortise locksets. For an office or entrance door, the Cal-Royal NM8050 with auxiliary deadlatch. For a restroom or bedroom, the Cal-Royal NM8440 privacy mortise lockset with deadbolt. If you want another classroom option, the Corbin Russwin ML2003 and Cal-Royal NM8070 are both Grade 1 classroom mortise locksets, listed for 1-3/4 inch doors.
13) What is the difference between the MSS Series classroom lock and a storeroom mortise lock like the Accentra 8805FL?
Function is the difference. The Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset with an interchangeable core option. Storeroom function keeps the outside lever locked at all times with key entry only. The TownSteel MSS Series is classroom function, where the key controls whether the outside lever is locked or free. Both are Grade 1 mechanical mortise locks.
14) The room needs privacy locking from the inside, not classroom function - what mortise lock fits?
For inside privacy locking, look at the Cal-Royal NM8440, a Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, or the Hager 3840S 3800 Series Grade 1 privacy mortise lock with a 2-3/4 inch backset for 1-3/4 to 2 inch doors. The TownSteel MSS Series is classroom function and keyed on a single cylinder, so control comes from the key side rather than an occupant-operated privacy set.
15) What should I use for a non-keyed passage or office opening instead of the MSS classroom lock?
For a non-keyed opening, the Schlage PM010 is a Grade 1 non-keyed passage latch mortise lock for 1-3/4 inch doors, and the Hager 3810E is a 3800 Series Grade 1 passage mortise lock with escutcheon and 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors. The Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon, non-keyed, also 2-3/4 inch backset. The TownSteel MSS Series is keyed with a single cylinder, so a passage or non-keyed office lock is the simpler choice where no key control is wanted.
16) Is a Sargent 130KB thumbturn or an Ilco 185 deadbolt an alternative to the MSS Series classroom lock?
No. The Sargent 130KB is a standard duty mortise thumbturn for the 8200 Series, and the Kaba Ilco 185 Series is a no-handing mortise deadbolt. Both are single-purpose components rather than complete locksets. The TownSteel MSS Series is a complete Grade 1 heavy duty sectional mortise lock with latch bolt, guard bolt, ANSI strike, lever trim, and a brass thumb turn included.
17) Between the TownSteel MSS Series and the BEST 45H, which suits a high-traffic entrance and which a classroom?
The BEST 45H is a heavy duty mortise lock body with public entrance function and field reversible operation, and the related 45HCA is a heavy duty mortise lockbody with intruder function, which locks the door from inside the room. The TownSteel MSS Series is a heavy duty Grade 1 mortise lock with classroom function, handed at order time as LH, RH, LHR, or RHR. Choose public entrance where the lever stays free until keyed locked, classroom where the key from the corridor controls the outside lever, and intruder where staff must secure from within.
18) Does a residential-style mortise lock like the Baldwin 6310 replace a TownSteel MSS classroom lock?
They are not interchangeable in the opening. The Baldwin 6310 entry/storeroom mortise lock body uses a 2-1/2 inch backset for doors 1-3/8 inch and over, and the Baldwin 6301 entry/apartment body is also 2-1/2 inch backset. The TownSteel MSS Series uses a 2-3/4 inch backset, so the lever centerline and door prep differ, and it is a commercial Grade 1 classroom function lock.
19) What mortise lock should I use for a dormitory corridor rather than a classroom?
The Sargent 7925 is a Grade 1 heavy duty dormitory exit function mortise lock in the 7900 Series with rose trim and a single cylinder deadbolt. The TownSteel MSS Series is a Grade 1 heavy duty classroom function lock with sectional escutcheon trim and a single cylinder, so the 7925 is the one to look at when the opening needs a deadbolt and dormitory/corridor operation instead.
20) What lever styles and finishes can I get on the TownSteel MSS classroom mortise lock?
Eight lever designs are offered: Artistic, Congr, Gala, Imperial, Quest, Regal, Sentinel, and Tango. Finishes run 605 bright brass, 606 satin brass, 622 matte black, 625 bright chrome, 626 satin chrome, 629 bright stainless, and 630 satin stainless. If you are matching existing hardware in a building, 626 satin chrome and 630 satin stainless are the two that pair with most commercial openings. The thumb turn is brass, Classic Visible as standard.
21) Is there a template for cutting the door for the TownSteel MSS mortise lock?
TownSteel publishes an MSS installation template, linked from the product resources, that gives the pocket and through-bolt layout. Work to it along with the 2-3/4 inch backset and the 1-1/4 x 8 inch faceplate dimension when you lay out the mortise pocket and faceplate mortise on the door edge.
22) Are the Emtek 3102 or Falcon MESC600DT alternatives for an inactive leaf next to an MSS classroom lock?
Yes, for a non-functioning leaf. The Emtek 3102 Memphis and 3104 Hamilton are dummy mortise entrance locksets, the Falcon MESC600DT is a dummy escutcheon lever trim for M9900 Series exit devices with a fire rating, and the Schlage L0170 is a Grade 1 heavy duty half dummy mortise lever trim for 1-3/4 inch doors. None latch. The TownSteel MSS Series is a working keyed classroom lock with a 3/4 inch stainless latch bolt and guard bolt.
How fast can I get the TownSteel MSS-R-T-05-605 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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 TownSteel MSS-R-T-05-605 come with a warranty?
Absolutely. The TownSteel MSS-R-T-05-605 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 TownSteel MSS-R-T-05-605?
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