TownSteel MSS Series Single Cy...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$502.00
$498.42
TownSteel TownSteel MSS Series Holdback Function - Heavy Duty Sectional Mortise Lock , Single Cylinder TWS-MSS-06

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

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Model: MSS-R-T-06-626
$502.00
$498.42
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$502.00
$498.42
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TownSteel MSS Series Single Cylinder Mortise Lock with Holdback Function - ANSI Grade 1 Heavy Duty Sectional Trim

The TownSteel MSS Series Single Cylinder Mortise Lock with Holdback Function is an ANSI Grade 1 heavy duty sectional trim mortise lock built for single opening, stand-alone applications or ready integration into sophisticated access control systems. It features a 2-3/4" backset, a 3/4" projection stainless steel split anti-friction latch bolt, and a 1-1/4" x 8" stainless steel faceplate paired with a 10-9/16" x 2-3/8" x 9/32" brass escutcheon. Optional status sensors including REX, PRIV, DAJ, and MKO allow this lock to be configured for advanced commercial access control.

Key Features

  • Backset & Latch Bolt Dimensions: 2-3/4" backset with a 3/4" projection stainless steel, split, anti-friction latch bolt for smooth, reliable latching.
  • Faceplate & Escutcheon: 1-1/4" x 8" stainless steel faceplate paired with a 10-9/16" x 2-3/8" x 9/32" brass escutcheon for a clean, commercial-grade appearance.
  • Heavy-Duty Stainless Steel Hardware: Stainless steel guard bolt and rocker-type stop works provide long-term durability in high-traffic commercial doors.
  • Forged Brass/Cast Zinc Levers: Levers are plated to match finish symbols for a consistent, professional appearance across the opening.
  • Classic Visible Brass Thumb Turn: Standard brass thumb turn supports reliable single cylinder keyed operation.
  • Sectional Trim, Single Opening Design: Built for stand-alone applications or ready integration into sophisticated access control systems.
  • Optional Status Sensors: Configurable with REX (request-to-exit), PRIV (privacy), DAJ (door ajar), and MKO (mechanical key override) sensors for advanced access control.
  • Holdback Function: ANSI Grade 1 heavy duty mortise lock construction with single cylinder keyed function for versatile commercial use.

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: Holdback
  • 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 deliver professional-grade reliability with heavy duty stainless steel latch bolt, guard bolt, and rocker-type stop works construction built to ANSI Grade 1 standards. Forged brass/cast zinc levers and a brass escutcheon provide a lasting, consistent appearance, while optional REX, PRIV, DAJ, and MKO sensors make these locks ready for demanding commercial and access-controlled environments.

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:
Holdback
Product Category:
Mechanical Locks
Department:
Door Hardware

TownSteel MSS-R-T-06-626 – Frequently Asked Questions

1) What does the holdback function do on the TownSteel MSS mortise lock?
Holdback lets you hold the latch retracted so the door stays push-open until you release it, which is how crews keep a keyed opening free during move-ins, deliveries, or business hours and then relock it at close. The MSS is a keyed, single cylinder lock, so key control stays with one cylinder on the outside and a thumb turn inside.
2) Do I have to specify handing when ordering a TownSteel MSS mortise lock?
Yes, handing is a required selection: LH, RH, LHR, or RHR. Stand outside the opening, the hinge side tells you left or right, and reverse means the door swings toward you. Get it wrong and the lever and latch bevel end up backwards on the opening.
3) Can I get a batch of these TownSteel mortise locks keyed alike for one building?
Keying is chosen at order time: KD keyed different is standard, KA keys multiple locks alike, or you can supply a specific key code for special keying. For a property manager standardizing a floor or a building, KA across the order is the usual call. There's also an SFIC prep, less core option if your facility already runs small format interchangeable cores and you want to pin and install your own.
4) Is the TownSteel MSS mortise lock heavy duty enough for a high traffic commercial door?
It's an ANSI Grade 1 heavy duty commercial mortise lock, which is the top durability tier for door hardware and the right call for entrances, corridors, and other openings that see constant use. The latch bolt is stainless steel, split and anti-friction with a 3/4 inch projection, with a stainless guard bolt and stainless rocker type stop works.
5) I need a Grade 1 mortise lock but in a classroom or storeroom function instead of holdback. What else is there?
Holdback is a specific function and won't serve a classroom or a storeroom opening. For classroom, the Corbin Russwin ML2003 is a Grade 1 mortise classroom lockset for 1-3/4 inch doors, and the Cal-Royal NM8070 is a Grade 1 classroom mortise lockset with auxiliary deadlatch. For storeroom, look at the Accentra 8805FL Grade 1 storeroom mortise lock or the Cal-Royal NM8080, which offers an interchangeable core option. Privacy openings take the Cal-Royal NM8440 with deadbolt.
6) What is a Grade 1 storeroom mortise lock alternative to the TownSteel MSS Series holdback lock?
The TownSteel MSS Series is a Grade 1 heavy duty mortise lock built for the holdback function with a single cylinder. If the opening needs a storeroom function instead - outside lever always locked, key retracts the latch - the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series with an Arcadia lever, and the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option. Both change the function, so confirm the door schedule calls for storeroom and not holdback before swapping.
7) I need an electronic version of a Grade 1 mortise lock instead of a mechanical one - what are my options?
The TownSteel MSS Series is a mechanical, non-electronic mortise lock that the maker describes as ready for integration into access control systems. If you want the credential reader built into the lock instead, the Schlage CO-100-MS-40-KP is a Grade 1 heavy duty standalone electronic mortise lock with a keypad reader in privacy function for 1-3/4 inch doors, the Alarm Lock DL3500CR is a Grade 1 Trilogy electronic mortise lock with 300 user codes and classroom function for 1-5/8 to 1-7/8 inch doors, and 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. Those carry their own function assignments, so match the function to the opening.
8) Is the Baldwin 6310 mortise lock body interchangeable with the TownSteel MSS Series?
No, the pocket prep differs. The TownSteel MSS Series uses a 2-3/4 inch backset with a 1-1/4 by 8 inch stainless steel faceplate. The Baldwin 6310 and 6310190RRLS are 2-1/2 inch backset entrance/storeroom mortise lock bodies for doors 1-3/8 inch and over, and the Baldwin 6301 entry/apartment bodies are also 2-1/2 inch backset. A 2-1/2 inch backset lock will not drop into a pocket bored for 2-3/4 inch without rework of the cylinder and spindle holes.
9) Which mortise lock do I pick for an electrified opening tied to a card reader instead of the TownSteel MSS?
The MSS Series is a non-electronic mortise lock the maker describes as ready for access control integration, with optional status sensors including request-to-exit, privacy, door ajar and mechanical key override. If you need the lock itself electrified, the Schlage L9092EU 03A is a heavy duty electric lock/unlock outside lever mortise lock, keyed outside, with request to exit and 12/24VDC operation for 1-3/4 inch doors, the Command Access ML190 is a heavy duty motorized mortise lock in storeroom function with field selectable EL/EU operation and 24VDC power, and the BEST 45HW is a heavy duty wired electromechanical mortise lock with 12V/24V operation.
10) Will the 3/4 inch latch throw work with my existing strike and frame gap?
The latch bolt throws 3/4 inch and is a split, anti-friction stainless design, which handles the small misalignment you get on a frame that has settled. It's supplied with an ANSI strike in plated or stainless steel, so if your frame already has the ANSI lip cutout you can reuse the prep. On a door with an unusually deep gap to the stop, measure the gap first; 3/4 inch of throw needs most of that to engage.
11) What lever styles and finishes can I get on the TownSteel MSS sectional 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, with the levers in forged brass or cast zinc plated to match the finish symbol. If you're matching existing openings, 626 satin chrome and 630 satin stainless are the two most common in commercial buildings.
12) What's the difference between the MSE low and MSE regular escutcheon options?
The escutcheon choice is the trim plate height behind the lever, offered as MSE Low or MSE Regular. Regular is the full plate at 10-9/16 x 2-3/8 x 9/32 inches in brass; the low option is the shorter plate for openings where a full height escutcheon runs into a vision lite, a closer arm, or a narrower stile. Pick the one that matches the other doors in the building if you're keeping trim consistent.
13) Is this mortise lock electronic, and can it be tied into an access control system?
The MSS as ordered here is a mechanical, keyed mortise lock, not electronic. If you need a motorized or credential driven mortise lock on the same opening, comparable options include the Command Access ML190 Series motorized mortise lock with field selectable EL/EU operation on 24VDC, or the BEST 45HW wired electromechanical mortise lock running 12V or 24V.
14) Is a Sargent 130KB thumbturn a substitute for the TownSteel MSS mortise lock?
No. The TownSteel MSS Series is a complete heavy duty Grade 1 mortise lock with a single cylinder and sectional trim, supplied with lever, escutcheon, latch bolt and ANSI strike. The Sargent 130KB and 130W are mortise thumbturns only - standard duty trim pieces for 8200 Series and 7800 Series locks respectively - and contain no lock case or latch. Order them to change or replace the inside turn on an existing mortise lock, not to lock an opening.
15) What is a simpler non-keyed mortise lock if the opening does not need a cylinder?
The TownSteel MSS Series is keyed with a single cylinder. For an opening with no locking requirement, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock in the MA Series with field reversible operation and a fire rating, 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 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 3810E shares the 2-3/4 inch backset used by the MSS Series, so the lock case pocket location matches.
16) What should I order instead of the TownSteel MSS if the door needs a privacy bath function?
The MSS Series holdback function keeps the latch held back once set; it is not a privacy set. For bathrooms and bedrooms, the Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with deadbolt for 1-3/4 inch doors, and the Hager 3840S is a Grade 1 privacy mortise lock with a 2-3/4 inch backset for 1-3/4 to 2 inch doors. The Hager matches the 2-3/4 inch backset of the MSS Series.
17) If I only need a mortise lock case with no trim, what is comparable to the TownSteel MSS?
The TownSteel MSS Series is a complete sectional trim lockset with lever, brass escutcheon and thumb turn included, offered in eight lever styles including Artistic, Imperial and Sentinel. When the trim is already on the door and only the case needs replacing, the BEST 45HCAC is a heavy duty mortise lock body in public entrance function with field reversible operation, and the BEST 45HCAINL is a heavy duty mortise lockbody with intruder function. Confirm the existing trim spindle and cylinder prep suit the BEST body before ordering a case alone.
18) We use small format interchangeable cores across the building - which mortise locks support that?
The TownSteel MSS Series can be ordered with an SFIC prep, less core, so your locksmith installs the facility core, or with a standard cylinder. Among comparable Grade 1 units, the Cal-Royal NM8080 storeroom mortise lockset for 1-3/4 inch doors is offered with an interchangeable core option. That gives you two routes to a single keyway standard across the doors, though the NM8080 is a storeroom function rather than holdback.
19) Is an Emtek 3104 Hamilton mortise entrance set an equivalent to the TownSteel MSS Series?
No. The Emtek 3104 Hamilton and 3106 Manhattan mortise entrance locksets are dummy function, meaning they are non-operating trim for an inactive leaf. The TownSteel MSS Series is a Grade 1 heavy duty commercial mortise lock, keyed with a single cylinder and an operating latch bolt with 3/4 inch projection. Use the Emtek pieces on a fixed door and the MSS on the door that has to latch and lock.
20) What is a dormitory or corridor function mortise lock alongside the TownSteel MSS?
For corridor and dormitory openings, the Sargent 7925 is a Grade 1 heavy duty mortise lock in the 7900 Series with dormitory exit function, rose trim and a single cylinder deadbolt. The TownSteel MSS Series is also Grade 1 heavy duty and single cylinder, but it is a holdback function with sectional escutcheon trim rather than rose trim, offered in low and regular escutcheon heights. Choose on the function the door schedule calls out and on whether you want rose or escutcheon trim showing.
21) Is the Kaba Ilco 185 Series a substitute for the TownSteel MSS Series mortise lock?
They do different jobs. The Kaba Ilco 185 Series is a deadbolt function mortise lock supplied with no handing. The TownSteel MSS Series is a latching lockset with a 3/4 inch stainless split anti-friction latch bolt, a stainless guard bolt and an ANSI strike, and it must be ordered by hand - left, right, left hand reverse or right hand reverse. If the opening needs latching by a lever, the 185 will not cover it; if you only need a keyed bolt, the Sargent 4874 is a double cylinder mortise deadbolt with a 2-3/4 inch backset matching the MSS backset.
22) Sectional trim versus escutcheon trim on a mortise lock, which do I want?
The MSS is a sectional trim lock, meaning the lever and cylinder mount on separate pieces rather than one long plate, which gives a cleaner look and less coverage of the door face. Full escutcheon trim is what you want when you're covering an older prep or an oversized hole from previous hardware. Hager's 3800 Series shows both approaches, the 3810E with escutcheon and the 3810S with rose, if you're comparing trim styles.
23) Is there a template for prepping the door for the TownSteel MSS mortise lock?
Yes, TownSteel publishes an MSS installation template, linked from the product information, and it gives the pocket, faceplate, and trim hole locations. Prep to a 2-3/4 inch backset with a 1-1/4 x 8 inch faceplate cutout and the matching ANSI strike prep in the frame.
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Can I return it if it doesn’t work for me?
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Does the TownSteel MSS-R-T-06-626 come with a warranty?
Absolutely. The TownSteel MSS-R-T-06-626 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-06-626?
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