Name: Marks USA MESC600A Lever/Escutcheon Storeroom Exit Device Trim for M9900 Series — Field Reversible, Lifetime Warranty
Brand: Marks USA
SKU: MESC600A-26D
Price: 84.66 USD
Availability: InStock

Product Overview
FAQs

Marks USA MESC600A Lever/Escutcheon Storeroom Exit Device Trim for M9900 Series

The Marks USA MESC600A is a professional-grade Lever/Escutcheon Storeroom Exit Device Trim engineered specifically for the M9900 Series Touchbar Exit Devices. Designed for Entry (Entrance/Office) mechanical function, this trim features a 1-1/4" mortise cylinder type and accommodates a minimum stile size of 3-1/2" on doors with a standard 1-3/4" thickness. Compatible with both wood and metal doors, the MESC600A ships with a standard Marks "C" Keyway KNK cylinder for panic device applications and is field reversible for flexible handing on the job site. UL305 listed and backed by a Lifetime Limited Warranty, this trim delivers dependable commercial-grade performance.

Key Features

Minimum Stile Size: Requires a minimum 3-1/2" stile, ensuring compatibility with standard commercial door profiles.
Door Thickness Compatibility: Designed for 1-3/4" door thickness, the most common specification in commercial construction.
Cylinder Type: Accepts a 1-1/4" mortise cylinder for secure, conventional key entry operation.
Field Reversible Handing: Easily reversible in the field to accommodate left-hand or right-hand door configurations without special ordering.
Standard Marks "C" Keyway KNK Cylinder: Includes a standard Marks "C" Keyway KNK cylinder specifically designed for panic device applications.
Door Material Compatibility: Suitable for installation on both wood and metal doors, providing versatile application across commercial environments.
M9900 Series Compatibility: Engineered exclusively for use with Marks USA M9900 Touchbar Series exit devices for seamless integration.
Lifetime Limited Warranty: Backed by a Marks USA Lifetime Limited Warranty for long-term confidence and protection.

Certifications & Compliance

UL305 Listed
Commercial Grade
Lifetime Limited Warranty

Technical Specifications

Product Group: Exit Devices and Trim
Commercial/Residential: Commercial
Subcategory: Exit Devices - Rim
Product Type: Exit Device Trims
Features: Key Entry Exit Device Trim
Series: M9900 Touchbar
ADA Compliant: No
Product Function: Entrance/Office
Cylinder Classification: Conventional Cylinder
Product Category: Exit Devices and Trim
Department: Door Hardware

Typical Applications

Commercial Office Buildings
Educational Facilities
Healthcare Institutions
Retail Establishments
Industrial and Warehouse Facilities
Multi-Tenant Residential Properties
Government and Municipal Buildings

Why Marks USA MESC600A?

Marks USA exit device trim products are built to exacting commercial standards, with the MESC600A offering field-reversible handing, a 1-1/4" mortise cylinder, and UL305 listing for verified performance in demanding environments. Engineered for the M9900 Touchbar Series, this trim delivers reliable entry control on wood or metal doors with a minimum 3-1/2" stile — all backed by a Lifetime Limited Warranty that reflects Marks USA's commitment to professional-grade durability.

Manufacturer Resources

Marks USA Product Catalog

Product Specs

Product Group:: Exit Devices and Trim
Product Subgroup:: Exit Device Trim
Commercial/Residential:: Commercial
Subcategory:: Exit Devices - Rim
Product Type:: Exit Device Trims
Features:: Key Entry Exit Device Trim
Series:: M9900 Touchbar
ADA Compliant:: No
Product Function:: Entrance/Office
Cylinder Classification:: Conventional Cylinder
Product Category:: Exit Devices and Trim
Department:: Door Hardware

Marks USA MESC600A-26D – Frequently Asked Questions

1) What is the minimum stile width for the Marks MESC600A exit device trim?

It needs a 3-1/2 inch minimum stile. That rules out most aluminum storefront doors, whose stiles are typically narrower, and puts this on hollow metal or wood doors with a standard commercial profile. If the opening is a narrow stile glass front door, look at a narrow stile trim instead, such as the BEST 2900 Series 2901 lever trim for 2000 Series devices.

2) Do I have to order the Marks MESC600A handed, or can I flip it on site?

Field reversible, so one part number covers left hand and right hand. You set the handing during install rather than specifying it on the order, which is why a property manager stocking spares only has to carry the one item for both swings.

3) Does the Marks MESC600A come with a cylinder, or do I order one separately?

The cylinder is included. It ships with a standard Marks "C" keyway KNK cylinder built for panic device use, in the 1-1/4 inch mortise cylinder size the trim takes. Nothing extra to buy unless you are keying it into an existing system on a different keyway, in which case you would swap in your own 1-1/4 inch mortise cylinder.

4) Can I get several MESC600A trims keyed alike for one building?

Yes. Keying is a required choice at order: keyed different is the standard, and keyed alike is offered when you want multiple openings on one key. For a facility standardizing a run of exit doors, pick keyed alike across the order; for tenant spaces that must stay separate, keyed different.

5) Can I use a nightlatch exit trim in place of the Marks USA MESC600A?

Nightlatch trim looks similar but behaves differently: the key retracts the latch only while it is turned, so the lever does not stay unlocked the way an Entrance/Office trim does. The Sargent 704ET is a night latch lever trim with field reversible operation in the 700 series, the Sargent 704-ETL is night latch with key retract in the PE series, the Corbin Russwin VT957ET is a nightlatch escutcheon trim for the ED5000 series, and the Dorma YR03R is a wide stile escutcheon lever trim in nightlatch function supplied less cylinder. Choose one of these only if momentary key access is what the opening actually calls for; otherwise the MESC600A's Entrance/Office function is the match.

6) I need keyed lever trim for a door thinner than 1-3/4 inch. What should I use instead of the Marks MESC600A?

The MESC600A is designed for a 1-3/4 inch door thickness. On a thinner leaf, the Tell EDELT53 escutcheon lever trim in keyed entry function covers a 1-3/8 inch to 1-3/4 inch door thickness range, as does the Tell EDTHP53 if a thumbpiece is acceptable in place of a lever. The Pamex E9000 storeroom trim covers 1-3/8 inch to 2 inch. Match the function to the opening: EDELT53 and EDTHP53 are keyed entry, the E9000 is storeroom.

7) I need the outside lever released by an access control system. What is the electrified alternative to the Marks USA MESC600A?

The MESC600A is mechanical key entry trim with a conventional cylinder and no electrical option. For access control release, Command Access offers electrified exit trim with 12V/24V operation and fail safe or fail secure selection in the ET15, ET25 and ET26 series, with the ET26 built to Grade 1 and field reversible, plus the 230L that electrifies Von Duprin trim for V96, 36 and 23 series devices. The Von Duprin E360L-BE-03 is a Grade 1 electric passage trim with the 03 lever, fail safe, for 33 and 35A series devices, and the Falcon 510L-FSA/FSE is electrified heavy duty lever trim for 25 series devices. Dormakaba's E-Plex 201U and PowerPlex P201U are pushbutton exit trims if credential entry at the door is preferred over a wired system.

8) What is the closest equivalent to the Marks USA MESC600A if the exit device is not an M9900 Touchbar?

The MESC600A is built for Marks USA M9900 Touchbar devices, so on another manufacturer's rim device you match the trim to that device family instead. For a lever-and-escutcheon trim in storeroom function, the Tell EDELT80 is an exit device escutcheon lever trim in storeroom function, and the Pamex E9000 is a storeroom function heavy duty exit device trim in the E9000 series. Design Hardware's KIL storeroom function trim covers 1000 and 2000 series exit devices with a Schlage C keyway and a flat lever. Confirm the trim is listed for the device series already on the door before ordering.

9) What is the difference between the Marks USA MESC600A and the Tell EDELT80 storeroom lever trim?

Both are escutcheon lever trims. The MESC600A carries an Entrance/Office function and takes a conventional 1-1/4 inch mortise cylinder on a 1-3/4 inch door with a minimum 3-1/2 inch stile, and it ships with a Marks C keyway KNK cylinder. The Tell EDELT80 is a storeroom function escutcheon lever trim rated for a 1-3/8 inch to 1-3/4 inch door thickness range. Storeroom keeps the outside lever always locked and retracted only by key; the Marks entrance function is the one to specify when the office keying convention is what you are matching.

10) My door has a narrow stile. Does the Marks USA MESC600A fit, and what are the narrow stile options?

The MESC600A requires a minimum 3-1/2 inch stile, so a narrower aluminum stile will not take it. BEST offers narrow stile trim in the 2000 series exit only pull with cover plate and the 2901 narrow stile exit only lever trim, both for 2000 series exit devices. Note that both are exit only, so they give no keyed outside entry; if outside key access is required on a narrow stile door, confirm the trim against the stile dimension before ordering.

11) Which keyed exit trim uses a Schlage C keyway instead of the Marks C keyway on the MESC600A?

The MESC600A ships with a standard Marks C keyway KNK cylinder built for panic device applications, which means it keys into a Marks system. If the building is keyed to Schlage C, the Design Hardware KIL trim is available in entry function and in storeroom function for 1000 and 2000 series exit devices with a Schlage C keyway and a flat lever. Several other trims are supplied less cylinder, including the Dexter ED1000T classroom thumbpiece trim, the Corbin Russwin VT957ET nightlatch escutcheon, the Dorma YR03R, and the Tell exit device pull trim with cylinder hole, letting a locksmith fit the building's own cylinder.

12) Will exit device trim made for a mortise or vertical rod device work where the Marks MESC600A goes?

Not automatically. The MESC600A is a rim exit device trim for the M9900 Touchbar series. Trim built for other device types is called out as such: the Sargent 744 Grade 1 freewheeling trim retracts the latch by key and is for surface vertical rod and mortise 8700 and 8900 series devices, the Corbin Russwin x910ET is passage function heavy duty trim for the ED5200S, ED5200, ED5400 and ED5800 series, and the x810ET is passage function for SecureBolt, rim, surface and concealed vertical rod on the ED4000 series. The Dormakaba PowerPlex P201U covers rim, mortise and SVR devices. Match the trim to the device chassis type, not just to the door.

13) What does the entrance/office function on the Marks MESC600A actually do at the door?

Entrance/office function means the lever gives keyed entry from the outside while the touchbar always allows free egress. The key controls whether the outside lever is live, so staff can lock the exterior side down for the night and the door still pushes open from inside. It is key entry trim, not a passage or dummy trim.

14) Can the MESC600A be installed on a wood door, or is it metal only?

Both. The trim mounts on wood and metal doors, provided the leaf is 1-3/4 inch thick with at least a 3-1/2 inch stile. That covers hollow metal exterior doors and solid core wood interior doors in the same building on one part number.

15) What is the difference between the Marks MESC600A and a nightlatch exit trim?

On the MESC600A the key controls the outside lever for entrance/office use, so the lever is the normal way in. A nightlatch trim, like the Sargent 704ET or the Corbin Russwin VT957ET escutcheon trim, retracts the latch with the key only, with no lever function until the key is turned. Pick entrance/office where people go in and out through the door regularly, nightlatch where the outside is meant to stay secure and only the keyholder gets in.

16) Is there a simpler exit device trim than the Marks USA MESC600A if I do not need key entry from the outside?

The MESC600A is a key entry trim with a conventional mortise cylinder, so it is the wrong part when the outside is never meant to unlock. For egress only with no outside operation, the BEST 1700 series pull trim and the BEST 4900 series lever trim are both exit only for 2000 series devices in wide stile, with the 2000 series pull trim and 2900 series lever trim covering narrow stile. If the outside lever should always be free, the Arrow SRX01 is a passage function Sierra lever with rose for ED910, S1150 and S1250 devices, and the Corbin Russwin 3310AET is passage function for the ED300 series. A dummy trim such as the Detex 02BN S-lever with blank escutcheon for Value Series devices is pull only with no latch operation at all.

17) Which exit device trim should I specify for a classroom instead of the Marks USA MESC600A?

The MESC600A is an Entrance/Office function trim, which is not the classroom convention. For classroom function, the Falcon 510L is a heavy duty lever trim for 24/25 series devices, the Falcon 179L is a medium duty lever control trim for the 1790 series, the Accentra 446F is a Grade 1 Augusta lever trim in classroom function, and the Dexter ED1000T-CLRM-TP-NC is a Grade 1 classroom thumbpiece and pull plate trim supplied less cylinder. Each is tied to its own device series, so verify the device on the door first.

18) Is a pull trim with a cylinder hole the same thing as the Marks USA MESC600A?

No. The MESC600A is a lever and escutcheon trim, so the outside operator is a lever that retracts the latch. A pull trim gives a fixed pull instead of a moving lever: the Tell exit device pull trim carries a cylinder hole and is supplied less cylinder, the Design Hardware 2P-03NL is a Grade 1 pull trim with cylinder hole in night latch function for 1000R and 2000R devices, and the Dexter ED1500T-PULL-NC is a nightlatch function trim with a raised lip pull plate. Those give key access but no lever, which matters where a lever is expected for accessibility or where the door is used constantly.

19) What lever escutcheon trim in entrance function works besides the Marks USA MESC600A?

The MESC600A is an Entrance/Office function lever and escutcheon trim for M9900 Touchbar devices. In entrance function from other makers, Delaney's 500L exterior trim comes in CT, MD and SD lever styles, all entrance function, and the Design Hardware LE08 is a Grade 1 entry function trim with a flat lever and escutcheon for 1000R and 2000R devices. The Tell EDELT53 is an escutcheon lever trim in keyed entry function. Lever style is the visible difference across the Delaney options; the device series compatibility is what decides which of the others will mount.

20) The MESC600A is field reversible for handing. Which other exit device trims are also field reversible?

Field reversibility means one part covers left hand and right hand openings, which matters when stocking trim for a fleet of doors. The MESC600A is reversible in the field without special ordering. Among other makers, the Sargent 704ET night latch lever trim has field reversible operation, and the Command Access ET26 electrified trim is Grade 1 with a field reversible design. Function differs across the three, so reversibility alone does not make them interchangeable.

21) What finishes does the Marks MESC600A lever trim come in?

Two: 626 satin chrome and US10B oil-rubbed dark bronze. Satin chrome is the usual match for institutional and school hardware, oil-rubbed bronze for openings where the rest of the hardware is dark. Those are the only two, so if the building standard is brass or stainless, this trim will not match it.

22) I want a knob or blank escutcheon instead of a keyed lever like the Marks MESC600A. What are my options?

The MESC600A pairs a lever with a keyed escutcheon. If a knob is preferred, the Von Duprin 210K-BE is a Grade 1 heavy duty knob with blank escutcheon for 22 series devices. For a plate with no operator at all, the Von Duprin 230DT is a heavy duty dummy trim with a 10 gauge steel escutcheon for 22 series, the Falcon 212L is a 20 series escutcheon lever trim with shear pin protection in blank escutcheon, and the Dexter ED1500T dummy function trim uses a handle pull plate. These give no key entry, so they suit doors that are exit only.

23) Does the Marks USA MESC600A come in the same finishes as competing exit device trim, and how do I match existing hardware?

The MESC600A is offered in 626 satin chrome and US10B oil-rubbed dark bronze, and it can be ordered keyed different as standard or keyed alike where several openings should share a key. Satin chrome and its 26D equivalent are the common commercial finish across the category, which is what the Tell EDELT53, EDELT80, EDTHP53 and pull trim carry as 26D. When matching an existing run of doors, match the finish code, then confirm the trim is listed for the device family on those doors.

How fast can I get the Marks USA MESC600A-26D 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 MESC600A-26D come with a warranty?

Absolutely. The Marks USA MESC600A-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 MESC600A-26D?

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 MESC600A-26D from ZenSupply?

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Marks USA MESC600A Lever/Escutcheon Storeroom Exit Device Trim for M9900 Series — Field Reversible, Lifetime Warranty

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