Marks USA MAR175DW 175DW Insti...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$192.28
$107.68
Marks USA 175DW Institution Lever Lockset - Grade 2 Survivor Series, American Lever, Institution

Marks USA MAR175DW 175DW Institution Lever Lockset — Grade 2 Survivor Series, Clutch Mechanism, 3-Hour Fire Rated

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Model: 175DW-26D
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$192.28
$107.68
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Marks USA 175DW Institution Lever Lockset — Grade 2 Survivor Series, Clutch Mechanism, 3-Hour Fire Rated

The Marks USA 175DW is a heavy-duty cylindrical Institution lever lockset from the Survivor Series, engineered for demanding commercial environments where durability and long-term performance are critical. Featuring a unique stainless steel "clutch" mechanism paired with bronze roller bearings on a cast retractor chassis, this lockset exceeds BHMA Grade 1 specifications by 300% — achieving over 3.6 million cycles. Designed for doors 1-5/8" to 1-7/8" thick (with K1904 spacer for 1-3/8" doors), it accommodates 2-3/4" backset and carries a 3-hour fire rating, making it ideal for institutional and high-traffic commercial applications. The Institution (DW) function features a deadlocking latch bolt operated by key in lever from either side, with both levers always inoperable.

Key Features

  • Exceeds BHMA Grade 1 by 300%: Tested to over 3.6 million cycles, far surpassing standard Grade 1 requirements for exceptional long-term reliability in high-traffic environments.
  • Unique Stainless Steel Clutch Mechanism: When locked, levers disengage from the retractor and interior mechanisms, swinging freely without resistance — dramatically reducing wear, abuse, and lever droop.
  • Cast Retractor on Bronze Roller Bearings: All cylindrical lock chassis are constructed with cast retractors on bronze roller bearings for millions of cycles of smooth, dependable operation.
  • 3-Hour Fire Rated: Rated for 3-hour fire assemblies; compatible with 2-3/8" and 2-3/4" backsets for flexible installation.
  • Door Thickness Compatibility: Fits doors 1-5/8" to 1-7/8" thick; use K1904 spacer for 1-3/8" doors.
  • Latch & Strike Specifications: Latch #1134 with 1-1/8" x 2-1/4" front, 1/2" throw, and stainless steel nose; Strike #1145 ASA strike included.
  • Solid Cast Zamac Levers: Levers feature solid cast Zamac construction with 1/2" return for durability and a professional appearance.
  • Thru-Bolted Roses: 3-1/4" diameter, spring-loaded roses secured with 2 #10 thru-bolts for a secure, tamper-resistant installation.
  • Marks Lifetime Mechanical Warranty: Backed by Marks USA's lifetime mechanical warranty for long-term confidence and protection.

Certifications & Compliance

  • ANSI/BHMA Certified — Exceeds Grade 1 Specifications by 300%
  • UL Listed
  • 3-Hour Fire Rated
  • ADA Compliant
  • ANSI Function F87 (Asylum/Institution/Utility)
  • Marks USA Lifetime Mechanical Warranty

Technical Specifications

  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • ANSI/BHMA: ANSI/BHMA, UL Listed
  • Commercial/Residential: Commercial
  • Function Description: Deadlocking latch bolt operated by key in lever from either side. Both levers are always inoperable.
  • ADA Compliant: Yes
  • Keyed: Yes
  • ANSI Function: F87
  • Product Function: Asylum/Institution/Utility
  • Door Thickness Range: 1-3/4"
  • Strike Classification: ANSI, 1-1/4" x 4-7/8", 1-1/4" Lip, Square Corner
  • Product Category: Mechanical Locks
  • Department: Door Hardware

Typical Applications

  • Healthcare and Hospital Facilities
  • Correctional and Detention Institutions
  • Educational Facilities and Schools
  • Government and Municipal Buildings
  • Commercial Office Buildings
  • Multi-Tenant Residential and Assisted Living Properties
  • Industrial and High-Traffic Commercial Environments

Why Marks USA 175DW?

Marks USA Survivor Series locksets are built to outlast the competition, with a proprietary stainless steel clutch mechanism and bronze roller bearing chassis that together exceed BHMA Grade 1 specifications by 300% — delivering over 3.6 million cycles of reliable performance. The 175DW Institution lockset is engineered for the most demanding commercial and institutional environments, combining 3-hour fire rating, ADA compliance, UL listing, and a lifetime mechanical warranty into a single, professionally-grade solution.

Manufacturer Resources

Marks USA Product Catalog

Product Specs

Latch Throw:
1/2"
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:
Deadlocking latch bolt operated by key in lever from either side. Both levers are always inoperable.
Front Size:
1-1/8” x 2-1/4”
ADA Compliant:
Yes
Keyed:
Yes
ANSI Function:
F87
Product Attribute:
Cylindrical Locks
Product Function:
Asylum/Institution/Utility
Door Thickness Range:
1-3/4"
Strike Classification:
ANSI, 1-1/4" x 4-7/8", 1-1/4" Lip, Square Corner
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Marks USA 175DW-26D – Frequently Asked Questions

1) What does the Marks USA 175DW institution function actually do when someone tries the lever?
Both levers on the 175DW are always inoperable. The deadlocking latch bolt is retracted only by key in the lever, and it works from either side, so nobody passes in either direction without a key. That is ANSI function F87, the asylum/institution/utility function. It is the right lock for a mechanical room, a med room, or a utility closet where you want key control from both faces. It is the wrong lock for any door someone may need to exit through under load, because there is no free egress from the inside.
2) Will the Marks 175DW fit my existing 2-3/4 inch backset prep?
Yes. The 175DW is a cylindrical lockset bored for a 2-3/4 inch backset, which is the standard commercial backset on a 161 prep. The latch front measures 1-1/8 by 2-1/4 inches, so it drops into a standard square-corner latch mortise without recutting the edge.
3) Will the Marks 175DW lockset work on a 1-3/4 inch door?
1-3/4 inches is exactly what the 175DW is specified for, and that is the standard commercial door thickness, so a typical hollow metal or solid core commercial leaf takes it as-is. If your doors run thicker or thinner than 1-3/4, a different cylindrical lock with a stated range is the safer specification: the Cal-Royal CAL30 Calypso covers 1-3/8 to 2 inches and the Dorma C150 covers 1-3/8 to 2-1/4 inches.
4) Will the Marks 175DW latch into the strike that's already in my frame?
It depends on what strike is in there. The 175DW ships with an ASA strike, 1-1/4 by 4-7/8 inches, square corner, 1-1/4 inch lip. If your frame is already prepped for a full ASA strike of that size, the lock drops straight in. The latch has a 1/2 inch throw, so the strike lip and the gap between door and frame need to be tight enough for that half inch to engage fully. On a frame cut for a small T-strike rather than a full ASA, the frame gets modified or you reuse the existing T-strike prep with a different lock.
5) Can I use the Marks 175DW on a 3 hour fire rated door?
Yes. The 175DW carries a 3 hour fire rating and is UL Listed, so it can go on a fire assembly rated up to 3 hours. It is also ADA compliant, which matters where the lever needs to meet accessibility requirements on the reachable side. Note the function itself locks both sides, so on any door in a required means of egress the fire rating is not the whole question, the egress requirement is.
6) What do I have to specify when I order the Marks 175DW, and what keying options are there?
Two things get picked. Keying is required at order: keyed different, keyed alike across a group of doors, or less core if you are supplying your own interchangeable core to match an existing system. Finish is satin chrome, US26D, which is the common commercial institutional finish. The ASA strike and the latch come with the lock, so the only separate purchase is the core if you order it less core.
7) I need key control on a patient room door but staff should be able to exit freely - is the 175DW the right lock?
No. The 175DW holds both levers inoperable at all times, with a key required from either side, which is why it suits utility and secure institutional openings rather than rooms people occupy. For a door where the inside must always open, the Dorma C150 is a Grade 1 entrance/office cylindrical lock and the Orca OCL250 is a Grade 2 entrance cylindrical lockset; either keeps the inside lever live. For a privacy opening, the Cal-Royal CAL20 is a Grade 1 extra heavy duty privacy lock and the Orca OCL240 is a Grade 2 privacy cylindrical lockset.
8) We need the lock tied into access control on a secure corridor - what goes in instead of the 175DW?
The 175DW is a standalone mechanical lock with no wiring or credential input. For an opening controlled from a panel, the SDC Electra 7200 Series is a solenoid controlled cylindrical lock running 12/24VDC for 1-3/4 inch to 2 inch doors, and the SDC E75 Series is a battery-powered electronic cylindrical lockset with keypad access control for 1-3/4 inch to 2-1/8 inch doors. The TownSteel FCE-2000 and FCE-4000 are Grade 1 RFID classroom locksets on 1-3/4 inch doors for credential-based entry without running power to the leaf.
9) Is the Marks 175DW tough enough for a hospital or school corridor that gets hammered every day?
That is what the Survivor Series chassis is built for. The 175DW is a Grade 1 cylindrical lock with a cast retractor riding on bronze roller bearings, tested past 3.6 million cycles. The stainless clutch is the part that matters on abuse doors: when the lock is locked, the levers disengage and spin free instead of transferring force into the retractor, which is what normally causes lever droop and chassis wear on institutional openings. It is specified commercial, not residential.
10) Does the Marks 175DW need handing when I order it?
No handing to specify on the 175DW. It is a cylindrical lock with levers that are key operated from both sides and no inside thumbturn or button, so there is no active side to call out. Get the backset right, 2-3/4 inches, and the door at 1-3/4 inches thick, and it goes on either hand of door.
11) Can I key the Marks 175DW into the master key system I already run in the building?
The 175DW is a keyed cylindrical lock and can be ordered keyed alike so a group of doors share one key, keyed different, or less core. Less core is the option for an existing system: you supply the interchangeable core that matches the keyway and master pinning already in the building, and the lock takes it. If you are standardizing a new set of utility doors from scratch, keyed alike is the straightforward order.
12) Can I standardize a facility on the 175DW and use it on doors thinner or thicker than 1-3/4 inch?
The 175DW is specified for 1-3/4 inch doors, with the 1-5/8 inch to 1-7/8 inch range covered and a K1904 spacer for 1-3/8 inch doors. Where a mixed door population runs wider than that, the Dorma C150 and C853 are both listed for 1-3/8 inch to 2-1/4 inch, and the Cal-Royal CAL20 and CAL30 cover 1-3/8 inch to 2 inch. Those are entrance, privacy and passage functions rather than F87, so a facility standardizing across varied door thicknesses usually mixes the 175DW on its 1-3/4 inch openings with a broader-range chassis elsewhere.
13) Is a keyless pushbutton lock like the Lockey 1600 a substitute for the 175DW on a utility room door?
They solve different problems. The Lockey 1600 is a heavy duty mechanical keyless knob lock with an adjustable backset for 1-1/8 inch to 2 inch doors, and the Lockey 2830 is a mechanical pushbutton keyless knob lock with an auto-locking passage function for the same thickness range - both are knob trim, code-entry, and not keyed. The 175DW is a lever, keyed from either side, ADA compliant, and 3-hour fire rated. On a door where the lever shape or the fire assembly is part of the spec, a keyless knob does not stand in for it.
14) What is the simpler option if the door only needs to latch and never lock?
The 175DW carries a keyed cylinder on both sides, which is unnecessary hardware on a door that never locks. For latch-only openings, the Cal-Royal CAL30 is a Grade 1 extra heavy duty passage cylindrical lockset for 1-3/8 inch to 2 inch doors, the Orca OCL210 is a Grade 2 medium duty passage cylindrical lockset, and the Dorma CL701 is a Grade 2 non-keyed lever lockset in passage function. Where the opening needs trim only with no latch at all, the Dorma C501 single dummy and the Orca OCL2170 Grade 2 half dummy lever cover it.
15) Which comparable cylindrical locks match the Marks 175DW on Grade 1 for a spec that calls for Grade 1 cylindrical hardware?
The 175DW is ANSI/BHMA certified and UL listed at Grade 1. Other Grade 1 cylindrical locks in the set include the Dorma C150 entrance/office and Dorma C853 entrance, both mechanical; the Cal-Royal CAL20 privacy and CAL30 passage; and on the electronic side the Alarm Lock DL2700, Alarm Lock Trilogy 4100 privacy, Schlage CO-100 privacy heavy duty, Schlage NDEB heavy duty, Schlage XE360M classroom/storeroom, and the TownSteel FCE-2000, FCE-4000, XCE-2000 and XCE-9000 classroom locksets. The functions differ widely across that list, so the grade alone does not settle the substitution - match the function to the opening first.
16) I am ordering the 175DW less cylinder for our SFIC system - which comparable locks also take interchangeable cores?
The 175DW can be ordered with no core for a less-core build alongside keyed different and keyed alike. Among the comparable electronic cylindrical locks, the Alarm Lock Trilogy T2 DL2700 is IC/SFIC compatible and fits 1-5/8 inch to 1-7/8 inch doors, and the BEST 9KZ EZ Series is an electronic keypad cylindrical lock with key override. The Schlage CO-100 is a Grade 1 heavy duty privacy keypad lock offered with cylinder options. Confirm the core format against your existing system before ordering either the mechanical or the electronic side.
How fast can I get the Marks USA 175DW-26D delivered?
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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 175DW-26D come with a warranty?
Absolutely. The Marks USA 175DW-26D 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 175DW-26D?
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