Marks USA MAR175AB 175AB Entry...
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$160.34
$85.82
Marks USA 175AB Entry Lever Lockset - Grade 2 Survivor Series, American Lever

Marks USA MAR175AB 175AB Entry Lever Lockset — Grade 2 Survivor Series, American Lever, 3-Hour Fire Rated

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Model: 175AB26D-3/4
$160.34
$85.82
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In Stock (leaves warehouse same day if ordered before 3pm ET)

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Marks USA 175AB Entry Lever Lockset — Grade 2 Survivor Series, American Lever, 3-Hour Fire Rated

The Marks USA 175AB is a Grade 2 cylindrical Entry Lever Lockset from the Survivor Series, engineered for commercial applications where durability and long-term performance are paramount. Featuring a unique stainless steel "clutch" mechanism and cast retractors on bronze roller bearings, this lockset exceeds BHMA Grade 1 specifications by 300%, achieving over 3.6 million cycles. Designed for door thicknesses of 1-5/8" to 1-7/8" (with optional K1904 spacer for 1-3/8" doors), it accommodates 2-3/8" and 2-3/4" backsets and carries a 3-hour fire rating. The Marks "C" keyway 6-pin cylinder with 2 keys and ADA-compliant lever design make it a versatile, code-compliant solution for a wide range of commercial door applications.

Key Features

  • Exceptional Cycle Durability: Exceeds BHMA Grade 1 specifications by 300% with over 3.6 million cycles, ensuring long-term reliability in high-traffic commercial environments.
  • Unique Clutch Mechanism: Stainless steel "clutch" disengages levers from the retractor when locked, dramatically reducing wear and abuse, eliminating lever droop, and extending product life.
  • Cast Retractors on Bronze Roller Bearings: Solid cast Zamac levers with 1/2" return and bronze roller bearing chassis construction deliver smooth, consistent operation over millions of cycles.
  • Door Thickness & Backset Compatibility: Fits door thicknesses of 1-5/8" to 1-7/8"; use K1904 spacer for 1-3/8" doors. Accepts both 2-3/8" and 2-3/4" backsets for flexible installation.
  • 3-Hour Fire Rated: Certified 3-hour fire rating supports use in fire-rated door assemblies for code-compliant commercial installations.
  • Latch & Strike Details: Includes Latch #1134 with 1-1/8" x 2-1/4" front, 1/2" throw, and stainless steel nose; paired with Strike #1145 ASA strike (ANSI, 1-1/4" x 4-7/8", 1-1/4" lip, square corner).
  • Thru-Bolted Roses: 3-1/4" diameter roses, spring-loaded with 2 #10 thru-bolts for secure, tamper-resistant mounting.
  • Marks "C" Keyway Cylinder: 6-pin cylinder with 2 keys included; deadlocking latch type for enhanced security in entry/office applications.
  • Lifetime Mechanical Warranty: Backed by Marks' lifetime mechanical warranty for added confidence and long-term value.

Certifications & Compliance

  • ANSI/BHMA Certified
  • UL Listed
  • Grade 2 (Exceeds BHMA Grade 1 by 300%)
  • 3-Hour Fire Rated
  • ADA Compliant
  • Marks Lifetime Mechanical Warranty

Technical Specifications

  • Grade: Grade 2
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • ANSI/BHMA: ANSI/BHMA, UL Listed
  • Commercial/Residential: Commercial
  • Function Description: Pushing and turning button on inside locks outside knob/lever requiring use of a key until button is manually unlocked.
  • ADA Compliant: Yes
  • Keyed: Yes
  • ANSI Function: F109
  • Product Function: Entrance/Office
  • Door Thickness Range: 1-3/4"
  • Latch Type Specification: Deadlocking
  • 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

  • Commercial Office Buildings and Corporate Campuses
  • Educational Facilities and School Classrooms
  • Healthcare Institutions and Medical Offices
  • Retail Establishments and Storefronts
  • Government and Municipal Buildings
  • Multi-Tenant Residential and Mixed-Use Properties
  • Industrial and Warehouse Facilities

Why Marks USA 175AB?

Marks USA Survivor Series locksets are built around a proprietary stainless steel clutch mechanism and cast retractors on bronze roller bearings — a combination that delivers over 3.6 million cycles, exceeding BHMA Grade 1 standards by 300%. With a 3-hour fire rating, ADA compliance, UL listing, and a lifetime mechanical warranty, the 175AB Entry Lever Lockset is engineered for demanding commercial environments where dependable, low-maintenance performance is non-negotiable.

Manufacturer Resources

Marks USA Product Catalog

Product Specs

Latch Throw:
1/2"
Grade:
Grade 2
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:
Pushing and turning button on inside locks outside knob/lever requiring use of a key until button is manually unlocked.
Front Size:
1-1/8” x 2-1/4”
ADA Compliant:
Yes
Keyed:
Yes
ANSI Function:
F109
Product Attribute:
Cylindrical Locks
Product Function:
Entrance/Office
Door Thickness Range:
1-3/4"
Latch Type Specification:
Deadlocking
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 175AB26D-3/4 – Frequently Asked Questions

1) Will the Marks USA 175AB entry lever fit a 1-3/4 inch commercial door?
Yes. The 175AB is built for 1-3/4 inch doors, which is the standard commercial thickness, and Marks rates the chassis across a 1-5/8 to 1-7/8 inch range. Going thinner than that, down to a 1-3/8 inch door, you need the K1904 spacer to make the chassis and thru-bolted roses pull up tight.
2) What does the F109 entry/office function actually do at the door?
F109 is the entry/office function. Push and turn the button on the inside lever and the outside lever locks, and it stays locked until someone manually unlocks the button, so a key is needed from outside in the meantime. That is different from a classroom function, where the outside lever is only locked and unlocked by key, and different from a storeroom function, where the outside lever is locked at all times. For an office suite, a back-of-house door, or a tenant space where staff want to secure the door on the way out and leave it secured, F109 is the one to spec.
3) Can I use the Marks 175AB on a 3-hour fire rated door?
Yes, the 175AB carries a 3-hour fire rating and is UL Listed and ANSI/BHMA certified, so it can go into a fire rated door assembly up to that rating. The deadlocking latch is part of why: a positive-latching lockset is what keeps the leaf secured in a fire event. It also meets ADA, and the lever with its 1/2 inch return is operable without grasping or twisting, which is what an inspector looks for on an accessible egress door.
4) Will the Marks 175AB latch into the strike already in my frame?
It depends on what strike is in there. The 175AB ships with the #1145 ASA strike, ANSI 1-1/4 x 4-7/8 inches with a 1-1/4 inch lip and square corners, which is the standard commercial frame prep. If your frame is cut for that ASA opening, it drops straight in. The latch itself has a 1/2 inch throw with a 1-1/8 x 2-1/4 inch front, so the door edge mortise needs to match that face size. A frame prepped for a small T-strike or a round-corner residential strike will need the opening reworked or a strike plate change.
5) What is the difference between the Standard and G3 Less Cylinder option on the Marks 175AB?
Standard ships with the Marks C keyway 6-pin cylinder and two keys, ready to hang. G3 Less Cylinder ships the lockset without a cylinder so you can drop in your own, which is what you order when the building is on an existing master key system or an SFIC core you already control. Pick G3 only if you have the cylinder and keys in hand; ordering it by mistake leaves you with a lock you cannot key.
6) What else could I use if the Marks 175AB will not fit my door thickness?
The 175AB tops out at 1-7/8 inches. For a thicker leaf, the Dorma C853 entry keyed single cylinder lever covers 1-3/8 to 2-1/4 inches and is Grade 1, and the Dorma C150 heavy duty cylindrical lock is the same entry/office function across that same 1-3/8 to 2-1/4 inch range. If the door is thinner than 1-5/8 and you would rather not use a spacer, both Dorma options start at 1-3/8 inches. For a Grade 2 entrance lever closer to the 175AB in duty level, the Orca OCL250 is a keyed entrance cylindrical lockset.
7) Marks USA 175AB versus Stanley QCL150 entry lever - what is the difference?
Both are Grade 2 keyed entry lever locksets and both use an ASA strike measuring 4-7/8 inch by 1-1/4 inch, so they drop into the same frame prep. The Marks USA 175AB is offered in 2-3/8 inch and 2-3/4 inch backsets with a Marks C keyway 6-pin cylinder, or as a G3 less-cylinder build. The Stanley QCL150 is a Sierra bent lever on a rose, supplied less cylinder with a square 2-3/4 inch backset latch. If you are keying into an existing Marks system, the 175AB matches; if you are installing your own cylinder in a bent lever style, the QCL150 is the parallel.
8) I need the same lever on a door that should not lock - what do I use instead of the 175AB?
The Marks USA 175AB is a keyed entry/office lock where the inside button locks the outside lever until a key or manual release. For an opening that must stay free-swinging, the Orca Hardware OCL210 is a Grade 2 passage cylindrical lockset, and the Cal-Royal CAL30 is a Grade 1 passage lockset covering 1-3/8 inch to 2 inch doors. For a restroom or bedroom that needs privacy rather than keying, the Orca OCL240 is a Grade 2 privacy cylindrical lockset and the Cal-Royal CAL20 is the Grade 1 privacy equivalent across the same 1-3/8 inch to 2 inch range.
9) Which lock replaces the Marks USA 175AB if I want keypad access instead of keys?
The Marks USA 175AB is a mechanical keyed lockset using a Marks C keyway 6-pin cylinder. For code-based entry in the same cylindrical door prep family, the Alarm Lock Trilogy T2 DL2700 is a Grade 1 standalone electronic cylindrical lock with a digital keypad, 100 user codes, IC/SFIC compatibility, and a 1-5/8 inch to 1-7/8 inch door range that matches the 175AB. If you need a record of who opened the door, the Alarm Lock DL3075 is a Grade 1 electronic cylindrical lock with audit trail. The BEST 9KZ EZ Series adds a key override alongside the keypad.
10) For a school classroom door, is the Marks USA 175AB the right function or should I look at a classroom lock?
The Marks USA 175AB is an entrance/office function - the inside button locks the outside lever until a key or manual release - which is not the same as a classroom function. If the district specifies classroom or classroom-intruder operation, the TownSteel XCE-9000 is a Grade 1 electronic classroom intruder cylindrical lockset with keypad for 1-3/4 inch to 2 inch doors, the TownSteel FCE-4000 is an RFID electronic intruder classroom lockset for 1-3/4 inch doors, and the Schlage XE360M is a Grade 1 wireless tubular lock in the classroom/storeroom function for 1-3/4 inch doors.
11) Will a Stanley QCL200 or QTL230E strike match the Marks USA 175AB frame prep?
Check the strike before you assume a swap. The Marks USA 175AB ships with an ASA strike classified ANSI, 1-1/4 inch by 4-7/8 inch, 1-1/4 inch lip, square corner - the same 4-7/8 inch by 1-1/4 inch ANSI strike the Stanley QTL230E uses. The Stanley QCL200, however, is supplied with a 118F ANSI strike measuring 1-1/8 inch by 2-3/4 inch, which is a different frame cutout entirely. Going from a 175AB to a QCL200 means new frame prep or a filler.
12) I need to key a new lock into an existing SFIC system - does the Marks USA 175AB work or do I need something else?
The Marks USA 175AB uses a Marks C keyway 6-pin cylinder with two keys, and it can also be ordered as G3 less cylinder if you are supplying your own. For an opening that must accept an interchangeable core directly, the Alarm Lock Trilogy T2 DL2700 is IC/SFIC compatible and is a Grade 1 standalone electronic cylindrical lock covering 1-5/8 inch to 1-7/8 inch doors, matching the 175AB thickness range. The Stanley QCL150 is also supplied less cylinder if you want a mechanical lever you cylinder yourself.
13) Is a Grade 2 lockset like the Marks 175AB tough enough for a high traffic commercial entrance?
The 175AB is certified Grade 2, but Marks tests it past 3.6 million cycles, which the description puts at 300 percent beyond BHMA Grade 1 cycle requirements. The reason is the chassis: a stainless steel clutch that disengages the levers from the retractor when the lock is secured, so someone yanking on a locked lever is not loading the retractor, plus cast retractors riding on bronze roller bearings. That clutch is what kills lever droop, which is the usual failure you see on a school or office corridor door after a few years.
14) Should I buy a mechanical lever lockset or an electronic keypad lock for my office door?
Mechanical, like the Marks 175AB, when the door just needs to be locked and unlocked by the people who work behind it and you want no batteries and no programming. Move to electronic when you need to hand out codes instead of keys or know who went through the door. The Alarm Lock Trilogy T2 DL2700 is the common step up, a Grade 1 standalone keypad cylindrical lock holding 100 user codes and fitting the same 1-5/8 to 1-7/8 inch door thickness range as the 175AB, so it goes on the same door. If you need an audit trail of every entry, the Alarm Lock T3 DL3075 covers that. Both cost you battery changes and setup time the 175AB does not.
15) I need a matching passage and privacy lever to go with the entry lockset on the same corridor. What works?
The 175AB is keyed entry/office only, so the closet and restroom doors need different functions. For a Grade 2 medium duty match, Orca has the OCL210 passage lockset, the OCL240 privacy lockset and the OCL2170 half dummy lever. If you want Grade 1 through the whole run, Cal-Royal Calypso covers it with the CAL20 privacy and the CAL30 passage, both fitting 1-3/8 to 2 inch doors. Levers from different makers will not visually match, so if appearance across the openings matters, pick one family for the non-keyed doors.
16) How does the Marks 175AB mount, and is it thru-bolted?
Thru-bolted, yes. The 175AB uses 3-1/4 inch diameter spring-loaded roses secured with two #10 thru-bolts that pass through the door and tie the two sides together. That is the mounting you want on an exterior or high abuse opening, since the outside rose cannot be pulled or spun off independently of the inside one. Plan for a 3-1/4 inch rose footprint on the door face when you are covering an old prep or working near a narrow stile.
17) Can I key the Marks 175AB into the master key system already running in my building?
Standard configuration comes with the Marks C keyway 6-pin cylinder and two keys, which is its own keyway and will not operate on another manufacturer's system. If the building is already mastered, order the G3 Less Cylinder version and install a cylinder cut to your existing system. The chassis is keyed on the outside lever only; the inside lever is always free for egress.
18) Is the Orca OCL250 a substitute for the Marks USA 175AB?
They are the nearest match on paper: the Orca Hardware OCL250 is a Grade 2 keyed entrance cylindrical lockset rated medium duty, and the Marks USA 175AB is a Grade 2 keyed cylindrical lockset in the entrance/office function. Where they part is service life and fire assembly use - the 175AB is built on a stainless steel clutch and cast retractors on bronze roller bearings for over 3.6 million cycles and carries a 3-hour fire rating. On a high-traffic or fire-rated opening, confirm the OCL250 against that requirement before swapping.
19) Can I use a Lockey keyless lock in place of the Marks USA 175AB?
They solve different openings. The Marks USA 175AB is a keyed lever lockset with an ADA-compliant lever and a 6-pin cylinder. The Lockey 1600 is a 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 in the passage function. Both are knob trim rather than lever trim, so on an opening where lever operation is required they are not a like-for-like swap. The Lockey E985 and E995 are electronic keypad lever locks for 1-3/8 inch to 1-3/4 inch doors, and the E985 adds a key override.
20) What do I order for the inactive leaf when the active door has a Marks USA 175AB?
The 175AB is a keyed, latching entry/office lockset with a deadlocking latch, which an inactive or pull-only leaf does not need. For matching non-latching trim, the Dorma C501 is a single dummy keyless lever lockset, Grade 2, for 1-3/8 inch to 1-3/4 inch doors, and the Dorma CL701 is a Grade 2 single dummy non-keyed lever. The Orca OCL2170 is a Grade 2 half dummy lever. Any of the three gives you lever trim with no latch or cylinder behind it.
21) What do I use in place of the Marks USA 175AB if the opening has to tie into an access control system?
The 175AB is a standalone mechanical lockset operated by key and inside button. For a credentialed or wired opening, the Schlage NDEB is a Grade 1 heavy-duty cylindrical lock with a 2.4 GHz Bluetooth Low Energy mobile-enabled reader covering 1-5/8 inch to 2 inch doors, which brackets the 175AB thickness range. For a hardwired release, the SDC Electra 7200 is a solenoid controlled cylindrical lock running dual voltage 12/24VDC on 1-3/4 inch to 2 inch doors. The TownSteel XCE-2000 is a Grade 1 keypad cylindrical lockset for the same 1-3/4 inch to 2 inch range.
22) The Schlage CO-100 and Marks USA 175AB are both called cylindrical locks - do they do the same job?
No. The Marks USA 175AB is a keyed entrance/office lockset with a 6-pin cylinder and a deadlocking latch. The Schlage CO-100 is a Grade 1 heavy-duty standalone electronic cylindrical lock in the privacy function with keypad, for 1-3/4 inch doors. Privacy is a bed and bath function with no keyed entry from the corridor, so it will not stand in for an entry/office opening. The same distinction applies to the Alarm Lock Trilogy 4100, a Grade 1 electronic cylindrical lock in the privacy function, and to the CENTRIOS CEB100 smart Bluetooth lock, also a privacy function.
23) Is a Kwikset SmartCode Tustin lever an alternative to the Marks USA 175AB on a commercial door?
The Marks USA 175AB is specified as commercial and is ANSI/BHMA certified and UL listed at Grade 2, with a 3-hour fire rating. The Kwikset 912TNL ZW500 SmartCode is an electronic Tustin lever in a keyed-one-side function with Z-Wave technology for 1-3/8 inch to 2 inch doors. It brings remote automation the 175AB does not, but on a commercial or fire-rated opening the certification and rating on the 175AB are what the spec is usually written against.
24) For a door that needs code entry from both sides, what replaces the Marks USA 175AB?
The Marks USA 175AB is keyed on the outside with an inside button, so the inside always releases freely. Where both faces need to be controlled, the Alarm Lock DL5200 is a double-sided electronic cylindrical lock with 100 user capacity and battery operation, fitting 1-5/8 inch to 1-7/8 inch doors - the same thickness band the 175AB is built for, so the leaf does not have to change.
25) What finish should I order to match the rest of the hardware in my building?
Five finishes are available on the 175AB: US3 bright brass, US10 satin bronze, US10B oil-rubbed dark bronze, US26 polished chrome and US26D satin chrome. US26D satin chrome is the workhorse in commercial buildings, so if the closers and hinges on the other openings look dull silver, that is almost certainly the match. US10B is the dark bronze used on hospitality and residential-look openings. Every finish is offered in both the 2-3/8 and 2-3/4 inch backset, so the finish choice does not restrict which prep you can order.
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Does the Marks USA 175AB26D-3/4 come with a warranty?
Absolutely. The Marks USA 175AB26D-3/4 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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