Marks USA 110F Storeroom Cylin...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$167.97
$87.34
Marks USA 110F Storeroom Round Knob, Marks C Keyway, 6 Pin, Keyed Different, 2-3/4in Backset, T-Strike, Grade 2

Marks USA 110F Storeroom Cylindrical Knob Lock, Marks C Keyway, 6 Pin, Keyed Different, 2-3/4" Backset, T-Strike, Grade 2

(No reviews yet) Write a Review

Model: 110F/32D-4C
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$167.97
$87.34
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Marks USA 110F Storeroom Cylindrical Knob Lock — Marks C Keyway, 6 Pin, 2-3/4" Backset, Grade 2

The Marks USA 110F is a commercial-grade storeroom cylindrical knob lock engineered for demanding environments where durability and long-term reliability are essential. Featuring a Marks "C" keyway with a 6-pin cylinder and 2 keys included, this lock is supplied keyed different and accommodates both 2-3/8" and 2-3/4" backsets. The lock chassis is constructed with cast retractors on bronze roller bearings, delivering performance that exceeds BHMA Grade 1 specifications by 300% — over 3.6 million cycles. Designed for doors with a thickness range of 1-5/8" to 1-7/8", the 110F is 3-hour fire rated and backed by the Marks lifetime mechanical warranty.

Key Features

  • Exceptional Cycle Durability: Exceeds BHMA Grade 1 specifications by 300%, tested to over 3.6 million cycles for outstanding long-term reliability in high-traffic commercial applications.
  • Dual Backset Compatibility: Accommodates both 2-3/8" and 2-3/4" backsets, providing flexible installation options across a wide range of door preparations.
  • Door Thickness Range: Designed for doors 1-5/8" to 1-7/8" thick, suitable for standard commercial door applications.
  • Precision Cylinder: Marks "C" keyway, 6-pin cylinder supplied with 2 keys, keyed different for individual door security management.
  • Heavy-Duty Knob & Rose Construction: 2-1/4" diameter (110) round knob with steel-reinforced adjustable roses measuring 2-3/4" diameter on both sides for a secure, finished appearance.
  • Stainless Steel Latch Assembly: Latch #1138 features a 1" x 2-1/4" front with a 1/2" throw and stainless steel nose; includes Strike #1136, a 2-3/4" "T" strike for reliable latching.
  • 3-Hour Fire Rated: Certified for 3-hour fire-rated door assemblies, supporting life-safety compliance in commercial buildings.
  • Lifetime Mechanical Warranty: Backed by the Marks lifetime mechanical warranty, providing long-term confidence and protection for commercial installations.

Certifications & Compliance

  • ANSI/BHMA Grade 2 Certified
  • UL Listed
  • 3-Hour Fire Rated
  • Exceeds BHMA Grade 1 Specification by 300% (3.6 million cycles)
  • Marks Lifetime Mechanical Warranty

Technical Specifications

  • Series: 10 Series
  • Product Group: Mechanical Locks
  • ANSI/BHMA: ANSI/BHMA, UL Listed
  • Commercial/Residential: Commercial
  • Function Description: Latch retracted by knobs/levers at all times
  • Front Size: 1-1/8" x 2-1/4"
  • Keyed: No
  • Product Function: Passage/Hall/Closet
  • Latch Type Specification: Deadlocking
  • Product Category: Mechanical Locks
  • Department: Door Hardware

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities and Schools
  • Healthcare Institutions and Medical Offices
  • Retail Establishments and Storefronts
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Marks USA 110F?

Marks USA cylindrical locksets are built on a foundation of cast retractors and bronze roller bearings — a construction approach that delivers performance exceeding BHMA Grade 1 standards by 300%, with over 3.6 million tested cycles. The 110F storeroom knob lock combines this proven chassis with a 6-pin Marks "C" keyway cylinder, 3-hour fire rating, and a lifetime mechanical warranty, making it a dependable choice for commercial door hardware professionals who demand lasting performance and code compliance.

Manufacturer Resources

Marks USA Product Catalog

Product Specs

Series:
110 Series
Latch Throw:
1/2"
Grade:
Grade 2
Product Group:
Mechanical Locks
Product Subgroup:
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”
Keyed:
No
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 110F/32D-4C – Frequently Asked Questions

1) Does the Marks 110F knob lock work with a 2-3/8 inch backset door prep, or only 2-3/4?
Both. The 110F is specified at a 2-3/4 inch backset and the chassis also accommodates a 2-3/8 inch prep, so it drops into either of the two standard cylindrical bore layouts without ordering a different part.
2) Can I use the Marks USA 110F on a fire rated door?
Yes. The 110F is rated for 3-hour fire door assemblies and is UL Listed, with a deadlocking latch, which is what a fire opening needs so the latch cannot be shimmed back under positive pressure.
3) Will the Marks 110F latch into the strike that is already in my frame?
Depends on what is in the frame now. The 110F has a 1/2 inch latch throw and ships with the #1136 strike, a 2-3/4 inch T strike, so it is set up for a T-strike frame prep. If your frames are cut for a full 4-7/8 inch ANSI strike, the supplied T strike will not cover the mortise and you will want an ANSI-prepped lockset such as the Stanley QCL150, which comes with a 4-7/8 by 1-1/4 inch ANSI strike.
4) What is the closest non-keyed alternative to the Marks USA 110F if I need a cylindrical lockset that stays unlocked on a corridor or closet door?
The Marks USA 110F is a cylindrical lock whose latch is retracted by the knobs or levers at all times and is supplied non-keyed. If you want the same passage behavior from another line, the Cal-Royal CAL30 Calypso is a Grade 1 passage lockset covering doors 1-3/8 inch to 2 inch thick, and the Orca Hardware OCL210 is a Grade 2 medium duty passage cylindrical lockset. The Marks 110F carries a Grade 2 rating with a 1/2 inch throw deadlocking latch, while the CAL30 is the option if your spec calls out Grade 1 or the door falls outside a standard commercial thickness.
5) I need a lever instead of a knob for ADA compliance but the same passage function as the Marks 110F - what should I order?
The Marks USA 110F is a cylindrical knob lock with passage function. For lever trim in the same passage function, the Dorma CL701 is a Grade 2 non-keyed cylinder lever lockset with passage function, matching the 110F's Grade 2 rating. The Orca Hardware OCL210 is also a Grade 2 passage cylindrical lockset. If you want a heavier chassis behind the lever, the Cal-Royal CAL30 Calypso passage lockset is Grade 1 and fits doors 1-3/8 inch to 2 inch.
6) The Marks 110F does not lock - what cylindrical lock should I use on a restroom or bedroom door instead?
The Marks USA 110F is non-keyed and its latch retracts from either side at all times, so it does not provide privacy. For a door that needs to lock from inside, the Cal-Royal CAL20 Calypso is a Grade 1 privacy lockset for doors 1-3/8 inch to 2 inch thick, and the Orca Hardware OCL240 is a Grade 2 medium duty privacy cylindrical lockset. The CAL20 is the heavier chassis of the two; the OCL240 sits at the same Grade 2 level as the 110F.
7) If the opening actually needs keyed entry, what cylindrical lock replaces the Marks 110F?
The Marks USA 110F is supplied non-keyed, so it will not secure an entrance. For keyed entry in a cylindrical chassis, the Orca Hardware OCL250 is a Grade 2 entrance lockset and the Stanley QCL150 is an entry lever with a 2-3/4 inch backset latch and a 4-7/8 inch x 1-1/4 inch ASA strike - the same 2-3/4 inch backset the 110F uses. For a heavier entrance chassis, the Dorma C853 is a Grade 1 single cylinder entry lever fitting doors 1-3/8 inch to 2-1/4 inch, and the Dorma C150 is a Grade 1 entry/office cylindrical lock over the same thickness range. Note the Stanley QCL150 ships with an ANSI strike rather than the T-strike prep the 110F uses.
8) Our door is 2 inches thick - the Marks 110F will not fit, so what cylindrical locks cover that thickness?
The Marks USA 110F is built for doors 1-5/8 inch to 1-7/8 inch thick, so a 2 inch door is outside its range. The Cal-Royal CAL30 Calypso passage lockset covers 1-3/8 inch to 2 inch, and for privacy the Cal-Royal CAL20 covers the same 1-3/8 inch to 2 inch range. If the door is thicker still, the Dorma C150 entry/office and Dorma C853 entry lever both cover 1-3/8 inch to 2-1/4 inch. The Lockey 2830 keyless pushbutton knob lock with passage function spans 1-1/8 inch to 2 inch if you also want code entry.
9) What size is the latch face on the Marks 110F, and will it match my existing door mortise?
The latch front measures 1-1/8 by 2-1/4 inches. That is the square-corner face size you should confirm against the edge mortise already cut in the door; if the existing cutout is a different width or has radius corners, the face will need to be re-prepped or shimmed.
10) Is a Grade 2 knob lock durable enough for a school or high traffic office corridor?
The 110F is ANSI/BHMA Grade 2 certified, but the chassis uses cast retractors on bronze roller bearings and has been cycle tested past 3.6 million cycles, which Marks states exceeds the BHMA Grade 1 cycle specification by 300 percent. For buildings that require a Grade 1 lockset on the spec sheet, that cycle number will not satisfy the submittal, and you would need a listed Grade 1 lock such as the Cal-Royal CAL30 or the Dorma C150.
11) What is included with the Marks USA 110F, and is the cylinder keyed on its own?
The 110F ships as a complete cylindrical set: knob trim with adjustable roses both sides, the #1138 stainless nose latch, and the #1136 2-3/4 inch T strike. The cylinder is a Marks C keyway, 6 pin, supplied keyed different with 2 keys, so each door comes on its own key rather than being keyed alike out of the box. If you are standardizing a building, plan on rekeying to your C keyway master system.
12) Is there an electronic or keypad version of a cylindrical lock like the Marks 110F for an opening where I do not want to manage keys?
The 110F is a mechanical key-operated cylindrical lock, so if you want code access on the same bore prep, look at standalone keypad cylindrical locks instead. The Alarm Lock Trilogy T2 DL2700 covers the same 1-5/8 to 1-7/8 inch door thickness range and is Grade 1 with 100 user codes and IC/SFIC compatibility. TownSteel's XCE-2000 keypad lockset and Schlage's NDEB wireless lock are other cylindrical options, though those are specified for thicker doors.
13) Is a dummy trim lever the same thing as the Marks 110F passage lock?
No. The Marks USA 110F has a working cylindrical chassis with a deadlocking latch and a 1/2 inch throw, so the door actually latches closed. Dummy trim such as the Dorma C501 single dummy lever or the Orca Hardware OCL2170 Grade 2 half dummy lever is fixed trim with no latch at all, used on inactive leaves and false doors. If the leaf needs to stay shut against a stop, you need the 110F or another latching passage lockset, not dummy trim.
14) We want keypad access on this door instead of a mechanical Marks 110F - what cylindrical locks fit the same 1-5/8 to 1-7/8 inch door?
The Marks USA 110F is a mechanical cylindrical lock with no electronics. For keypad access on a door in that same 1-5/8 inch to 1-7/8 inch thickness range, the Alarm Lock Trilogy T2 DL2700 is a Grade 1 standalone electronic cylindrical entrance lock with a digital keypad, 100 user codes and IC/SFIC compatibility, and the Alarm Lock DL5200 is a double-sided electronic cylindrical lock with 100 user capacity and battery operation covering the same thickness range. The Alarm Lock T3 DL3075 adds an audit trail. All of these require battery service, which the mechanical 110F does not.
15) For a classroom door, is the Marks 110F an acceptable substitute or do I need a different lock?
The Marks USA 110F is a non-keyed passage lock whose latch retracts from both sides at all times, so it cannot be used where a classroom or lockdown function is required. For those openings, the TownSteel XCE-9000 is a Grade 1 electronic classroom intruder cylindrical lockset with keypad for doors 1-3/4 inch to 2 inch, the TownSteel FCE-4000 is a Grade 1 RFID electronic intruder classroom lockset for 1-3/4 inch doors, and the Schlage XE360M is a Grade 1 wireless tubular lock with classroom/storeroom function for 1-3/4 inch doors. Use the 110F only where the door is meant to stay unlocked.
16) We are standardizing a facility on Grade 1 cylindrical hardware - which comparable takes the place of the Marks 110F?
The Marks USA 110F is ANSI/BHMA Grade 2 certified and UL listed. If the facility standard calls for Grade 1 on every opening, the Cal-Royal CAL30 Calypso is a Grade 1 extra heavy duty passage lockset and the Cal-Royal CAL20 is the Grade 1 privacy counterpart, both fitting doors 1-3/8 inch to 2 inch. For keyed openings in the same standardization, the Dorma C150 is a Grade 1 entry/office cylindrical lock and the Dorma C853 is a Grade 1 single cylinder entry lever.
17) Does the Stanley QCL200 cylindrical lock work as a drop-in for the Marks 110F strike prep?
Check the strike before you order. The Marks USA 110F ships with a 2-3/4 inch T-strike and a 1-1/8 inch x 2-1/4 inch front. The Stanley QCL200 is a cylindrical lock supplied keyed different in the SC keyway with a 118F ANSI strike measuring 1-1/8 inch x 2-3/4 inch, so the frame prep is a different size and the QCL200 is keyed where the 110F is non-keyed. If your frames are cut for a T-strike and the door does not need a key, the 110F matches the existing prep.
18) What finish does the Marks 110F knob lock come in, and will it match my other door hardware?
US32D satin stainless steel is the finish offered on the 110F. It is the standard commercial satin finish, so it lines up with the satin stainless closers, hinges, and exit hardware typically already hung in office, school, and healthcare corridors. If your building is standardized on satin chrome US26D or a bronze finish, this will read slightly different next to it.
19) How big are the knob and rose on the Marks 110F, and will they cover the old hardware marks?
The 110F uses a 2-1/4 inch diameter round knob with steel reinforced adjustable roses measuring 2-3/4 inches in diameter on both sides. The 2-3/4 inch rose covers a standard 2-1/8 inch cylindrical cross bore with margin around it, so it will hide the bore but not necessarily a larger worn ring left by oversized trim.
20) Can I use a mechanical pushbutton knob lock like the Lockey in place of the Marks 110F?
They serve different openings. The Marks USA 110F is a non-keyed cylindrical knob lock that stays free from both sides, with a 2-3/4 inch backset and a deadlocking latch. The Lockey 2830 is a mechanical pushbutton keyless knob lock with an auto-locking passage function for doors 1-1/8 inch to 2 inch, and the Lockey 1600 is a heavy duty mechanical keyless knob lock with an adjustable backset over the same thickness range. Choose a Lockey when the door must restrict entry by code without wiring or batteries; choose the 110F when the opening only needs a latching knob on both sides.
How fast can I get the Marks USA 110F/32D-4C 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 110F/32D-4C come with a warranty?
Absolutely. The Marks USA 110F/32D-4C 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 110F/32D-4C?
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
Why buy the Marks USA 110F/32D-4C from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!