Marks USA 5 Grade 1 Mortise Lo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$404.00
$130.00
Marks USA 5 Series Grade 1 Mortise Lock Body Only, Satin Stainless Steel Finish, Stainless Steel Bolts, Front View

Marks USA 5 Grade 1 Mortise Lock Body Only with Stainless Steel Bolts and Lifetime Mechanical Warranty

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Model: MRK-5
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$404.00
$130.00
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Marks USA 5 Grade 1 Mortise Lock Body Only with Stainless Steel Construction and Lifetime Mechanical Warranty

The Marks USA 5 Grade 1 Mortise Lock Body Only is a commercial-grade mechanical lock engineered for high-traffic door applications. Manufactured in Amityville, New York, USA, this mortise lock body complies with ANSI-A156.13 Grade 1 specifications and carries a Underwriters Laboratories 3-Hour Fire Rating, making it a reliable choice for code-compliant commercial installations. The lock features stainless steel bolts, latches, and independent lever support springs. BHMA Certified and backed by a Lifetime Mechanical Warranty, this 195 Series mortise lock body is built for demanding commercial environments.

Key Features

  • Stainless Steel Internal Components: Stainless steel bolts, latches, and independent lever support springs on lever sets provide corrosion resistance and long-term mechanical reliability.
  • Lever Support Springs with 5/16" Hubs: Integrated lever support springs with 5/16" hubs ensure consistent lever return and smooth operation throughout the product's service life.
  • Front Size: 1-1/4" x 8" front plate provides a precise fit for standard mortise door preparations.
  • Strike Classification: Compatible with 4-7/8" strike for secure door latching in commercial applications.
  • ANSI Function F01: Configured to ANSI Function F01 for straightforward integration into standard commercial door hardware specifications.
  • USA Manufactured: Made in Marks USA's own plant in Amityville, New York.
  • Lifetime Mechanical Warranty: Backed by a Lifetime Mechanical Warranty for long-term protection for commercial building owners and facility managers.

Certifications and Compliance

  • ANSI Grade 1 - Meets ANSI-A156.13 specification
  • Underwriters Laboratories (UL) 3-Hour Fire Rating
  • BHMA Certified
  • ANSI/BHMA and UL Listed
  • Lifetime Mechanical Warranty

Technical Specifications

  • Series: 195 Series
  • Features: Lever Support Springs With 5/16" Hubs
  • Product Group: Mechanical Locks
  • Product Type: Mortise Locks
  • ANSI/BHMA: ANSI/BHMA, UL Listed
  • Commercial/Residential: Commercial
  • Front Size: 1-1/4" x 8"
  • ANSI Function: F01
  • Strike Classification: 4-7/8"
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities and Schools
  • Healthcare Institutions and Hospitals
  • Retail Establishments and Shopping Centers
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential and Mixed-Use Properties

Why Marks USA 195 Series?

Marks USA 195 Series mortise lock bodies are manufactured in-house in Amityville, New York, with stainless steel bolts, latches, and independent lever support springs that meet ANSI-A156.13 Grade 1 standards and carry a UL 3-Hour Fire Rating. Engineered for demanding commercial applications, these locks deliver the professional-grade performance and code compliance that facility managers, architects, and security professionals require.

Manufacturer Resources

Marks USA Product Catalog

Product Specs

Series:
195 Series
Features:
Lever Support Springs With 5/16" Hubs
Grade:
Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Mortise Locks
Subcategory:
Cylindrical Locks
ANSI/BHMA:
ANSI/BHMA, UL Listed
Commercial/Residential:
Commercial
Latch Throw:
3/4"
Front Size:
1-1/4" x 8"
Hub Material:
Steel
ANSI Function:
F01
Product Attribute:
Mortise Locks
Electronic:
No
Strike Classification:
4-7/8"
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Marks USA MRK-5 – Frequently Asked Questions

1) Does the Marks USA 5 mortise lock body come with levers, roses, or a cylinder?
Body only. The Marks USA 5 is the 195 Series mortise case by itself, so trim (levers or knobs, roses or escutcheons) and the cylinder are separate orders. The case has 5/16 inch hubs with lever support springs, which is what the trim mounts to, and the front plate measures 1-1/4 x 8 inches. Keying is specified with the case: keyed different, keyed alike, or none if you are setting it up for a less-core arrangement.
2) Will the Marks USA 5 mortise lock body fit my existing door prep and strike?
The case takes a standard 2-3/4 inch backset mortise pocket with a 1-1/4 by 8 inch front, and it latches into a 4-7/8 inch ANSI strike, which is the usual commercial frame prep. Latch throw is 3/4 inch. If the frame already carries a 4-7/8 inch strike and the door pocket is cut for a 2-3/4 inch backset, the case drops in. Marks also builds this body at a 2-1/2 inch backset for narrower prep, so measure from the door edge to the center of the hub hole before you order.
3) Can I use a Marks USA 195 Series mortise lock on a fire rated door?
Yes. The 195 Series mortise body carries a UL 3-hour fire rating and is ANSI/BHMA and UL Listed to ANSI-A156.13 Grade 1, which is what a stair tower, corridor, or cross-corridor opening in a school or hospital normally calls for. Note the 3/4 inch latch throw: fire door assemblies rely on the latch staying engaged under pressure, so pair it with the 4-7/8 inch ANSI strike the case is classified for.
4) Which function should I order for a classroom versus an office door?
The Marks USA 5 mortise body is built in seven functions: entrance, office, storeroom, dormitory, classroom, privacy, and passage. Classroom means the outside lever is locked and unlocked by key only, with the inside always free. Office lets staff lock the outside lever from inside. Storeroom keeps the outside lever locked at all times and key retracts the latch, which is what most janitor and mechanical rooms get. Privacy is the bed and bath function, passage never locks. The function is a different case, not a field setting, so pick it on the order.
5) Does the Marks USA 5 mortise lock work with an access control system or a card reader?
No. It is a purely mechanical case with no electrified option, so there is no way to release the lever from a card reader or an access panel. For a credentialed opening, look at an electrified or standalone mortise lock instead: the Schlage L9092EU with request-to-exit runs on 12/24VDC for 1-3/4 inch doors, the BEST 45HW is a wired electromechanical mortise body at 12V/24V, and the TownSteel FME-2000 is a Grade 1 RFID classroom mortise lockset.
6) Will a Marks USA 195 Series mortise case fit a door prepped for a 2-1/2 inch backset?
Yes, but you have to order it that way. The case is made in both 2-1/2 inch and 2-3/4 inch backsets, and 2-3/4 inch is the standard commercial prep. Older doors and some narrower stiles take the 2-1/2 inch. Measure from the face of the door edge to the center of the knob or lever hole; if that comes out at 2-1/2 inches, the 2-3/4 inch case will not line up with the existing trim holes.
7) What is a direct alternative to the Marks USA 5 storeroom mortise lock body from another manufacturer?
The Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset and the Accentra 8805FL is a Grade 1 storeroom mortise lock in the 8800 Series, both covering the same storeroom function the Marks USA 5 offers in its Grade 1 body. One difference in scope: the Marks USA 5 is sold as a lock body, while the NM8080 is a complete lockset with an interchangeable core option and the 8805FL comes with the Arcadia lever, so trim and lever style come with those two rather than being specified separately.
8) What classroom mortise lock can I use instead of the Marks USA 5 classroom function?
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 classroom mortise lockset with an auxiliary deadlatch, also for 1-3/4 inch doors. Both match the classroom function the Marks USA 5 is offered in and both carry the same Grade 1 rating. The Corbin Russwin and Cal-Royal arrive as complete locksets; the Marks USA 5 is the lock body, which is what you want when the trim on the opening is staying.
9) I need a keypad or credential-controlled mortise lock instead of a key-operated one - what are the options?
The Marks USA 5 is a mechanical lock body with no electronic operation, so access is by key and lever only. For electronic control on a mortise prep, the Alarm Lock DL3500CR is a Grade 1 classroom-function electronic mortise lock with 300 user codes for 1-5/8 to 1-7/8 inch doors, the Schlage CO-100-MS-40-KP is a Grade 1 standalone electronic mortise lock with a keypad reader in privacy function for 1-3/4 inch doors, and the TownSteel FME-2000 is a Grade 1 heavy duty classroom mortise lockset with RFID. Those give code or card credentials the mechanical body cannot; they also bring batteries or power and a programming step into the job.
10) I need the mortise lock to be released by the access control system - what replaces the Marks USA 5?
For an opening tied to access control, the Schlage L9092EU-T-03A is a heavy duty electric lock/unlock outside lever mortise lock in corridor function, keyed outside, with request to exit and 12/24VDC operation for 1-3/4 inch doors; the BEST 45HW is a heavy duty wired electromechanical mortise lock with 12V/24V operation; and the Command Access ML190 is a heavy-duty motorized mortise lock in storeroom function with field selectable EL/EU operation on 24VDC. Each of those takes wiring to the frame and a power supply. The Marks USA 5 is mechanical, so it holds its function without any power at the door.
11) For a fire rated opening, which mortise locks besides the Marks USA 5 carry a fire rating?
The Marks USA 5 body carries a UL 3-Hour Fire Rating and is ANSI/BHMA and UL Listed at Grade 1. Among the alternatives, the Falcon MA101 Grade 1 heavy duty passage mortise lock is fire rated, and the Schlage Electronics LEMD-GRW ENGAGE Series Grade 1 wireless mortise lock carries a 3 hour fire rating with a 125kHz proximity reader. The Schlage Electronics LEBMB-ADD mobile-enabled mortise lock also carries a 3 hour fire rating but is Grade 2, so confirm the grade your specification calls for before swapping it in.
12) Should I buy a mortise lock body on its own or a complete mortise lockset?
Buy the body alone when the door already has good trim and escutcheons and the case has failed, or when you are standardizing case functions across a building and reusing the lever design. Buy a complete lockset when the door is new prep or the trim is worn. If you want the whole assembly instead of the Marks case, the Cal-Royal NM8080 is a Grade 1 storeroom mortise lockset for 1-3/4 inch doors with an interchangeable core option, and the Cal-Royal NM8070 is the classroom version at the same door thickness.
13) What is a Grade 1 alternative to the Marks USA 5 mortise lock if I need a different backset or a full trim package?
Several Grade 1 mortise options sit alongside it. The Corbin Russwin ML2003 is a Grade 1 classroom mortise lockset for 1-3/4 inch doors. The Hager 3850E is a Grade 1 office mortise lock with lever and escutcheon at a 2-3/4 inch backset, covering 1-3/4 to 2-1/2 inch doors, which is the one to look at for thick doors. For passage, the Schlage PM010 is a Grade 1 non-keyed mortise passage latch for 1-3/4 inch doors. All three ship as complete locks rather than a bare case.
14) Can I key several Marks USA 5 mortise locks alike across a building?
Yes. Keying is chosen with each case: keyed alike so one key runs a group of doors, keyed different so each opening has its own key, or none if you are supplying your own core later. Property managers replacing cases across a floor usually order keyed alike per unit or per common area and keyed different on tenant doors. Cylinders are not part of the body, so the keyway is set by the cylinder you pair with it.
15) Is the Marks USA 5 mortise lock body strong enough for a high traffic entrance?
It is built for commercial use and certified to ANSI-A156.13 Grade 1, the top durability tier for mortise locks, with stainless steel bolts and latches and steel hubs. The independent lever support springs matter on heavy openings: they carry the weight of the lever so it does not sag into the case and drag the hub, which is the common failure on a school or lobby door that sees constant use.
16) Does the Marks USA 5 mortise lock include a deadbolt?
No deadbolt. It is a latch-only mortise case at ANSI F01 with a 3/4 inch throw. If the opening needs a separate deadbolt, a mortise deadbolt like the Sargent 4874 double cylinder at a 2-3/4 inch backset installs as its own case, and among the keyed mortise locksets the Cal-Royal NM8440 is a Grade 1 privacy function with a deadbolt built in for 1-3/4 inch doors.
17) What is a simpler substitute if the opening only needs a passage latch and no keying?
For a non-keyed passage opening, the Schlage PM010 is a Grade 1 passage latch mortise lock for 1-3/4 inch doors, the Falcon MA101 is a Grade 1 heavy duty mortise passage lock with field reversible operation and a fire rating, and the Hager 3810S is a 3800 Series passage mortise lock with a rose and a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors. The Marks USA 5 is offered in a passage function too, but it requires a keying selection when ordered and is supplied as a body; the three above ship non-keyed and, in the Falcon and Hager cases, with the trim as part of the assembly.
18) What privacy mortise lock compares to the Marks USA 5 privacy function?
The Cal-Royal NM8440 is a Grade 1 privacy mortise lockset with a deadbolt for 1-3/4 inch doors, and the Hager 3840S is a 3800 Series Grade 1 privacy mortise lock with a 2-3/4 inch backset for 1-3/4 to 2 inch doors. Both are bed and bath privacy function, matching the privacy build of the Marks USA 5. The Marks USA 5 privacy body is available in 2-1/2 inch as well as 2-3/4 inch backset, which matters if the existing door prep is the shorter dimension.
19) What should I use instead of the Marks USA 5 if the office door needs an office function lockset with the trim included?
The Hager 3850E is a 3800 Series Grade 1 office mortise lock supplied with lever and escutcheon, non-keyed, at a 2-3/4 inch backset for 1-3/4 to 2-1/2 inch doors, and the Cal-Royal NM8050 is a Grade 1 office/entrance mortise lockset with an auxiliary deadlatch for 1-3/4 inch doors. Both land as a complete assembly. The Marks USA 5 is offered in office and entrance functions as a body at either 2-1/2 inch or 2-3/4 inch backset, which is the route when the lever and rose already on the door are staying put.
How fast can I get the Marks USA MRK-5 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 Marks USA MRK-5 come with a warranty?
Absolutely. The Marks USA MRK-5 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 Marks USA MRK-5?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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