Marks USA MAR5SS19LF 5SS19LF L...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$936.54
$536.92
Marks USA 5SS19LF LifeSaver Privacy Lever Mortise Lock - Institutional LifeSaver Mortise Lock, Anti-Ligature, Privacy

Marks USA MAR5SS19LF 5SS19LF LifeSaver Anti-Ligature Privacy Lever Mortise Lock - Grade 1, Institutional, Bright Stainless Steel

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Model: 5SS19LF-32D
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$936.54
$536.92
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Marks USA 5SS19LF LifeSaver Anti-Ligature Privacy Lever Mortise Lock — Grade 1 Institutional, Bright Stainless Steel

The Marks USA 5SS19LF LifeSaver is a Grade 1 institutional mortise lockset engineered specifically for behavioral health and detention facility environments where ligature resistance is a critical safety requirement. Featuring the SS19 lever rose design in Bright Stainless Steel (Polished Stainless), this mechanical mortise lock accommodates a required door thickness of 1-3/4 in with a 2-3/4 in backset and a 4-7/8 in curved lip strike plate. Constructed from stainless steel with a stamped steel case measuring 1-1/16", the 5SS19LF delivers non-handed installation flexibility and is cULus Listed with BHMA and ANSI compliance, including a 3-hour fire rating and full ADA compliance.

Key Features

  • Anti-Ligature Design: Ligature-resistant SS19 lever and rose configuration engineered to reduce self-harm risks in behavioral health and detention facility applications.
  • Door Thickness Compatibility: Designed for a required door thickness of 1-3/4 in (maximum 1-3/4 in) for precise institutional door integration.
  • Dimensional Specifications: Features a 2-3/4 in backset, 4-7/8 in curved lip strike plate, 9/16" latch throw, and a front size of 1-1/8" x 2-1/4" for accurate door preparation.
  • Grade 1 Construction: Stainless steel body with stamped steel case (1-1/16") and SS19 rose, providing institutional-grade durability for high-demand environments.
  • Clutch Lever with Needle Bearings: Internal clutch lever and needle bearing mechanism deliver smooth, reliable operation and resistance to forced-entry torque.
  • Non-Handed Installation: Non-handed design simplifies installation and reduces inventory requirements across mixed door configurations.
  • Deadlocking Latch: Dead bolt / deadlocking latch type (ANSI Function F75) with latch retracted by levers at all times for passage/hall/closet function.
  • Marks C Keyway: Outside locking/unlocking access via Marks C keyway; includes 2 keys. Keyed outside access with privacy function.
  • Lifetime Mechanical Warranty: Backed by Marks USA's lifetime mechanical warranty for long-term confidence in institutional deployments.

Certifications & Compliance

  • ANSI/BHMA Grade 1
  • cULus Listed
  • UL Listed — 3-Hour Fire Rating
  • ADA Compliant
  • Ligature-Resistant (Behavioral Health & Detention Facility Rated)
  • Marks USA Lifetime Mechanical Warranty

Technical Specifications

  • Series: 5SS19 Series
  • Latch Throw: 9/16"
  • Grade: Grade 1
  • Product Subgroup: Bored Locksets
  • Product Type: Cylindrical Locks
  • Subcategory: Cylindrical Locks
  • ANSI/BHMA: ANSI/BHMA, UL Listed
  • Function Description: Latch retracted by knobs/levers at all times
  • Front Size: 1-1/8" x 2-1/4"
  • ADA Compliant: Yes
  • Keyed: No
  • ANSI Function: F75
  • Product Attribute: Cylindrical Locks
  • Product Function: Passage/Hall/Closet
  • Latch Type Specification: Deadlocking
  • Backset (Distance): 2-3/4"
  • Department: Door Hardware

Typical Applications

  • Behavioral Health Facilities and Psychiatric Units
  • Detention Centers and Correctional Institutions
  • Healthcare Institutions Requiring Ligature-Resistant Hardware
  • Government and Municipal Buildings
  • Educational Facilities with Institutional Security Requirements
  • Commercial Office Buildings with High-Traffic Corridors
  • Multi-Tenant Residential Properties with Institutional Standards

Why Marks USA 5SS19LF?

Marks USA 5SS19LF LifeSaver mortise locksets are purpose-built for the most demanding institutional environments, combining a ligature-resistant SS19 lever design with Grade 1 stainless steel construction, clutch lever mechanics, and needle bearings for dependable long-term performance. Certified cULus Listed, ANSI/BHMA compliant, ADA compliant, and rated for 3-hour fire applications, the 5SS19LF meets the rigorous safety and code requirements of behavioral health and detention facility deployments. Backed by Marks USA's lifetime mechanical warranty, this lockset delivers the professional-grade reliability that institutional specifiers and security professionals require.

Manufacturer Resources

Marks USA Product Catalog

Product Specs

Series:
5SS19 Series
Latch Throw:
9/16"
Grade:
Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Cylindrical Locks
Subcategory:
Cylindrical Locks
ANSI/BHMA:
ANSI/BHMA, UL Listed
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Function Description:
Latch retracted by knobs/levers at all times
Front Size:
1-1/8” x 2-1/4”
ADA Compliant:
Yes
Keyed:
No
ANSI Function:
F75
Product Attribute:
Cylindrical Locks
Product Function:
Passage/Hall/Closet
Latch Type Specification:
Deadlocking
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Marks USA 5SS19LF-32D – Frequently Asked Questions

1) Will the Marks USA 5SS19LF LifeSaver fit a 1-3/4 inch door with a 2-3/4 inch backset?
That's exactly what the 5SS19LF is built for. It takes a required door thickness of 1-3/4 inches (1-3/4 max, so no thicker leaf) and a 2-3/4 inch backset, which is the standard commercial backset on a 4-inch-wide-prep opening. Door prep also needs to suit a front size of 1-1/8 by 2-1/4 inches. If your doors are thinner than 1-3/4 inches, this is the wrong lockset; something like the Cal-Royal CAL30 covers 1-3/8 to 2 inches.
2) What does the F75 function on the Marks USA 5SS19LF actually do at the door?
ANSI F75 means the latch is retracted by the levers at all times from both sides, so the door is always operable without a key. It is a passage/hall/closet function, and the lockset is listed as non-keyed. Use it on corridor, closet and hall openings where you want ligature-resistant trim but no locking.
3) Will the 9/16 inch latch on the Marks USA 5SS19LF work with my existing strike?
The 5SS19LF throws a 9/16 inch deadlocking latch and ships with a 4-7/8 inch curved lip strike plate. If your frame is already prepped for a 4-7/8 inch ANSI strike, the supplied plate drops straight in. A curved lip is what you want where the stop or an adjacent wall would catch a straight lip, and the deadlocking feature blocks the latch from being carded back.
4) Is the Marks USA LifeSaver 5SS19LF approved for fire rated doors and ADA openings?
Fire rated to 3 hours and cULus Listed, so it can go on a labeled opening up to that rating. It is also ADA compliant, with lever operation rather than a knob, and carries ANSI/BHMA Grade 1 for heavy institutional traffic.
5) What makes the Marks USA 5SS19LF anti-ligature, and where should it be used?
The ligature resistance comes from the SS19 lever and rose profile, which is shaped so a cord or strap cannot be looped and held. That is the reason to spec it over a standard Grade 1 lever on behavioral health units, psychiatric wards, detention and correctional openings. On a normal office corridor you would not pay for it; a Grade 1 passage lever like the Cal-Royal CAL30 does that job.
6) What is the closest Grade 1 privacy lever lockset to the Marks USA 5SS19LF for a standard restroom or patient room door that does not need ligature resistance?
The Cal-Royal CAL20 is the nearest straight equivalent: a Grade 1 extra heavy duty privacy lock in the Calypso series with a privacy/bed/bath function, and it fits doors from 1-3/8 in to 2 in thick, so it covers the 1-3/4 in door the Marks USA 5SS19LF is built for. The difference is the lever itself - the 5SS19LF uses the ligature-resistant SS19 lever and rose engineered for behavioral health and detention openings, while the CAL20 is a conventional lever set. If the opening is a standard commercial restroom with no self-harm risk assessment, the CAL20 carries the same Grade 1 rating.
7) Do I need to specify handing when ordering the Marks USA 5SS19LF LifeSaver lockset?
No handing to call out. The 5SS19LF is non-handed, so one part number covers left and right hand openings. For a facility standardizing across a lot of mixed doors, that cuts the stocking list down to a single SKU.
8) I need access control on a behavioral health door, not a mechanical passage lever. What else could I use?
The 5SS19LF is mechanical and non-keyed, so it gives you ligature-resistant trim and nothing more. If the opening needs credentialed access, look at electronic Grade 1 cylindrical options: the Schlage CO-100 in privacy function fits a 1-3/4 inch door, and the TownSteel FCE-2000 is a standalone motorized RFID lockset also at 1-3/4 inches. Neither is described as ligature resistant, so on a patient room door check that against your behavioral health spec first.
9) Is the Marks USA 5SS19LF heavy duty enough for a high traffic corridor?
Grade 1 is the top ANSI/BHMA duty level for commercial locksets, and the 5SS19LF is rated for commercial use with a stainless body, stamped steel case and an internal clutch lever on needle bearings. The clutch matters on abuse-prone doors: force the lever and it spins free instead of transferring torque into the spindle.
10) Which lockset should I use for a corridor or closet door that only needs the latch retracted by the lever at all times?
The Cal-Royal CAL30 is the Grade 1 passage option in the Calypso series, with a passage/hall/closet function and a 1-3/8 in to 2 in door thickness range. The Marks USA 5SS19LF is also catalogued with a passage/hall/closet function where the latch is retracted by the levers at all times, but it is the LifeSaver anti-ligature design intended for behavioral health and detention environments. For a plain corridor or storage door in the same building, the CAL30 delivers the same function class and Grade 1 rating without the institutional lever geometry.
11) Is there a lighter-duty passage or privacy lever I can use on back-of-house doors instead of the Marks USA 5SS19LF?
Yes. The Orca Hardware OCL210 is a Grade 2 medium duty passage cylindrical lockset and the Orca OCL240 is the Grade 2 medium duty privacy version. Both sit a duty class below the Marks USA 5SS19LF, which is ANSI/BHMA Grade 1 and UL listed. Offices, janitor closets and staff areas that do not see resident traffic are the usual place for the Orca sets; keep the 5SS19LF on the patient-side and secure-side openings where the ligature-resistant lever and Grade 1 construction are specified.
12) What do I use instead of the Marks USA 5SS19LF if the opening needs a privacy function with electronic access control and an audit record?
The Schlage CO-100 standalone electronic cylindrical lock is offered in a privacy function, is Grade 1 heavy duty, and is built for a 1-3/4 in door - the same door thickness the Marks USA 5SS19LF is designed for. The Alarm Lock Trilogy 4100 is another Grade 1 electronic privacy lock, fitting doors 1-5/8 in to 1-7/8 in. Both bring keypad credential management that the mechanical 5SS19LF does not, while the 5SS19LF is the one carrying the LifeSaver ligature-resistant lever design.
13) Will a dummy lever like the Dorma C501 work in place of the Marks USA 5SS19LF?
No - a dummy trim is not a substitute. The Dorma C501 is a Grade 2 single dummy trim keyless lever set, and the Orca OCL2170 is a Grade 2 half dummy lever; neither carries a latch. The Marks USA 5SS19LF has a deadlocking latch with a 9/16 in throw, a 2-3/4 in backset and a 1-1/8 in x 2-1/4 in front, so it is doing real latching work in a prepped door. Use a dummy only on an inactive leaf or a pull-side door with no latch prep.
14) The same opening needs a keyed entrance function rather than the Marks USA 5SS19LF - what Grade 1 lever covers that?
For a keyed opening, the Dorma C853 is a Grade 1 entry keyed single cylinder lever lockset in the C800 series with a 1-3/8 in to 2-1/4 in door thickness range, and the Dorma C150 is a Grade 1 heavy-duty entry/office lock covering the same thickness range. The Marks USA 5SS19LF is catalogued as non-keyed with a passage/hall/closet function, so if the door needs to be locked from a cylinder, the C853 or C150 is the one to spec.
15) What finish does the Marks USA 5SS19LF LifeSaver come in?
One finish: US32D satin stainless steel. With a stainless steel body it holds up to the cleaning chemicals and wipe-downs typical in healthcare and detention environments, and US32D is the default institutional finish so it matches most existing Grade 1 hardware sets.
16) For a classroom or school door in the same institutional building, what is used instead of the Marks USA 5SS19LF?
The TownSteel XCE-9000 is a Grade 1 heavy duty electronic classroom intruder cylindrical lockset with a keypad, fitting doors 1-3/4 in to 2 in, and the TownSteel FCE-4000 is an RFID electronic intruder classroom lockset, Grade 1 heavy duty for a 1-3/4 in door. Both are built around lockdown from inside the classroom. The Marks USA 5SS19LF is the mechanical LifeSaver lockset with the anti-ligature SS19 lever for behavioral health and detention openings, so the two serve different doors in the same facility.
How fast can I get the Marks USA 5SS19LF-32D 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 5SS19LF-32D come with a warranty?
Absolutely. The Marks USA 5SS19LF-32D 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 5SS19LF-32D?
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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