Sargent MD8640 Dummy Function ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,990.78
$2,680.33
Sargent MD8640 Dummy Function Concealed Vertical Rod Exit Device with Freewheeling Trim

Sargent MD8640 Dummy Function Concealed Vertical Rod Exit Device with Freewheeling Trim

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Model: MD8640E 10BE
From the MD8600 Series Collection
$3,990.78
$2,680.33
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,990.78
$2,680.33
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Sargent MD8640 Concealed Vertical Rod Exit Device with Freewheeling Trim - 8600 Series

Professional Concealed Vertical Rod Exit Device Solution

The Sargent MD8640 is part of the proven 8600 Series concealed vertical rod exit devices, engineered for standard width stile applications on hollow metal doors. This dummy function device accommodates door thicknesses from 1-3/4" minimum to 2-1/4" maximum with 4-1/2" minimum stile width requirements. The system features factory-cut rails available in four sizes to accommodate door widths from 24" to 48", with device centerline positioning at 41" from finished floor for standard applications.

Professional Features & Benefits

  • Door Compatibility: Designed for hollow metal doors with 1-3/4" to 2-1/4" thickness and 4-1/2" minimum stile width for versatile installation options.
  • Rail Sizing System: Four factory-cut rail sizes accommodate door widths from 24" to 48" (E Rail: 24"-32", F Rail: 33"-36", J Rail: 37"-42", G Rail: 43"-48") for precise fit.
  • Heavy-Duty Construction: Stainless steel top bolt and robust center case dimensions of 8-3/8" x 2-5/8" provide exceptional durability for commercial applications.
  • Concealed Design: Vertical rod mechanism provides clean aesthetics while maintaining reliable exit functionality for professional installations.
  • Flexible Installation Height: Standard 41" centerline from finished floor with 38" option for elementary schools and accessibility compliance applications.
  • Strike System Compatibility: Compatible with 650 Top Strike and 606 Bottom Strike for both panic and fire rated applications.
  • Electric Options Available: Supports multiple electronic enhancements including alarm (AL), Beacon (BT), SARGuide photoluminescent (PL), illuminated touchpad (TL), and various monitoring options (53-59).
  • Maximum Opening Capacity: Accommodates door openings up to 120" maximum height for large commercial applications.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness (1-3/4" to 2-1/4"), stile width (4-1/2" minimum), and door opening height specifications.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces, ensuring proper rail size selection based on door width.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions, accounting for center case dimensions of 8-3/8" x 2-5/8".
  4. Install all mounting hardware including 650 Top Strike and 606 Bottom Strike, securing the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment and smooth operation, verifying device centerline positioning at 41" from finished floor (or 38" for accessibility applications).
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

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

Why Choose Sargent Quality?

Sargent 8600 Series exit devices deliver professional-grade reliability with stainless steel top bolt construction and robust center case design engineered for demanding commercial applications. The concealed vertical rod system provides both aesthetic appeal and dependable exit functionality, with comprehensive electric options available for enhanced security and monitoring capabilities. Engineered for demanding commercial applications where dependable performance is essential.

Product Specs

Series:
MD8600 Series
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Devices - Mortise
Product Type:
Exit Devices - Mortise
Subcategory:
Mortise Exit Devices
Commercial/Residential:
Commercial
Stile Type:
Narrow Stile
Lock Function:
Dummy
Grade:
Grade 1
Model Series:
MD8600 Series
Product Model:
MD8640
Product Function:
Dummy
Product Category:
Exit Devices and Trim
Collection:
MD8600 Series
Department:
Door Hardware

Sargent MD8640E 10BE – Frequently Asked Questions

1) What does dummy function mean on the Sargent MD8640, and will it lock the door?
Dummy function means there is no latching or locking action. The MD8640 pushbar and its freewheeling ET trim are non-functional hardware: the lever always turns free and the touchpad does not retract anything. It is used on the inactive leaf of a pair, or wherever the opening needs to match the look of adjacent exit devices without securing anything. If you need the door to latch and be secured, you want an active mortise exit device in the 8600 family, not the MD8640.
2) How do I pick the right rail length for the Sargent MD8640?
Rails are factory cut to four sizes, ordered by your door width: E rail covers 24 to 32 inch doors, F rail 33 to 36 inches, J rail 37 to 42 inches, and G rail 43 to 48 inches. On the order form these show as 32, 36, 42 and 48 inch device sizes. Measure the actual leaf width, not the frame opening, and pick the band it falls in. Rails are not field cut.
3) Does the Sargent MD8640 have to be ordered handed?
Yes, handing is required. The MD8640 is ordered either RHR (right hand reverse) or LHR (left hand reverse), determined by standing outside the door: exit devices are always reverse bevel. Get this wrong and the device will not work on the leaf. If you want a non-handed mortise exit device instead, the Von Duprin 8875 and 9875 wide stile crossbar devices are listed as non-handed, and the Von Duprin 5575 narrow stile is field reversible.
4) Can I use the Sargent MD8640 on a wood door?
The MD8640 is specified for hollow metal doors. For wood doors, the mortise exit devices we carry that state wood compatibility are the Adams Rite 3300 Series (fire rated) and the Adams Rite 8300 Series (life-safety, non fire rated), both wide stile for wood and hollow metal.
5) I need a fire rated mortise exit device instead of a dummy device - what should I use?
The Sargent MD8640 is a dummy function device, so it does not latch. For a fire rated opening, the Adams Rite 3300 Series is a Grade 1 fire rated mortise exit device for wood and hollow metal doors, and the Corbin Russwin ED5600AL is a Grade 1 three hour fire rated mortise exit device that can be used exit only or with classroom or passage lever trim, with a 1-3/4 inch door thickness. Both are wide stile devices, so confirm your stile allows it; the MD8640 is a narrow stile device.
6) What is the closest narrow stile mortise exit device alternative to the Sargent MD8640?
Two narrow stile mortise exit devices sit alongside the Sargent MD8640, which is a Grade 1 narrow stile device: the Adams Rite 8400 Series, a Grade 1 narrow stile mortise exit device for aluminum doors that is not fire rated, and the Von Duprin 5575-3ft, a Grade 1 narrow stile crossbar mortise device, also not fire rated, with a 1-3/4 inch door thickness and field reversible handing. The MD8640 differs in that it is a dummy function device with freewheeling ET lever trim and a concealed vertical rod mechanism, and it is handed at order as RHR or LHR rather than field reversible.
7) What mounting height should the MD8640 exit device be set at?
Standard centerline is 41 inches from finished floor. A 38 inch centerline is used for elementary schools and where lower reach height is wanted for accessibility. Pick the height before ordering so the whole run of doors in a building lines up, since a mismatched dummy leaf beside an active device is the thing people notice.
8) Which strikes work with the Sargent 8600 concealed vertical rod device?
The 650 top strike and 606 bottom strike are the matched strikes, and they cover both panic and fire rated applications. The top bolt is stainless steel. Order the strikes with the device so the frame prep and the bolt engagement are worked out at the same time.
9) What lever trim choices are there on the Sargent MD8640?
Eight ET lever designs are offered, A, B, E, F, J, L, P and W, all freewheeling on the dummy function. You can also order the device with no trim at all if the outside face needs nothing. Pick the lever style that matches the active leaf and the rest of the openings so the pair reads as a set.
10) Concealed vertical rod or a mortise exit device with a surface latch - which should I use on a pair of doors?
Concealed vertical rod, like the 8600, latches at the head and sill with the rods hidden inside the door, so you get a clean face and no center mullion. It costs more in door prep, and the door has to be built for it. A mortise exit device latches into the frame or a mullion at the lock edge, which is simpler to install and service but needs something to latch into on a pair. Wide stile mortise alternatives include the Falcon 25-M-EO and the Von Duprin 9875; for aluminum narrow stile the Adams Rite 8400 is the narrow stile mortise option.
11) What is a simpler exit-only mortise device if I do not need lever trim?
The Sargent MD8640 ships with freewheeling ET lever trim in eight lever styles, or as device only. If you want a device with no trim at all, the BEST Precision 2301 Series is a 2300 Series mortise exit device configured exit only with heavy wrought construction, the Falcon 25-M-EO is a Grade 1 exit only mortise device on a 36 inch wide stile door at 1-3/4 inch thickness, and the Detex 30 Series Advantex is a Grade 1 device-only mortise exit device. All three are wide stile designs except the BEST, whose stile type is a separate confirmation.
12) Can I use a Von Duprin 9875 or 8875 in place of a Sargent MD8640?
Not as a direct swap. The Von Duprin 9875-3FT and 8875-3FT are both Grade 1 wide stile mortise exit devices, non-handed, 1-3/4 inch door thickness, and neither is listed as wood door compatible or fire rated. The Sargent MD8640 is a narrow stile concealed vertical rod device with a 4-1/2 inch minimum stile and dummy function, handed RHR or LHR. The wide stile Von Duprin devices need a wider stile and use a crossbar or smooth push case rather than a concealed vertical rod, so the door prep is different.
13) Which wide stile mortise exit device pairs with a Sargent MD8640 on the other leaf of a pair of doors?
If the second leaf is a wide stile door, the wide stile Grade 1 mortise devices to look at are the Adams Rite 8300 Series for wood or hollow metal doors, which is not fire rated, and the Adams Rite 3300 Series if the pair is fire rated. The Sargent MD8640 itself is narrow stile with a 4-1/2 inch minimum stile and a dummy function, so it is the inactive leaf side of that arrangement; match finish across both using the MD8640 finish range, which includes 32D satin stainless steel and 10B dark oxidized satin bronze.
14) Can I get the MD8640 in a black or white painted finish to match my storefront?
Yes. Along with the plated finishes (03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, 10B, 10BE, 10BL, 20D dark statuary bronze, 32 bright stainless, 32D satin stainless), the device is offered in BSP black suede powder coat and WSP white suede powder coat. Twelve finishes in all, so matching an existing run of doors is usually straightforward.
15) Is there a mortise exit device built for high-abuse openings rather than a dummy trim device?
The Von Duprin 9475/9575 Impact Series is a Grade 1 wide stile mortise lock exit device with a recessed push pad, which keeps the actuator back from impact; it is not fire rated. The Detex 30 Series Advantex is a Grade 1 wide stile mortise device that is not wood door compatible. The Sargent MD8640 takes a different approach for the same commercial traffic, using a stainless steel top bolt and a concealed vertical rod behind a narrow stile push rail.
How fast can I get the Sargent MD8640E 10BE 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 Sargent MD8640E 10BE come with a warranty?
Absolutely. The Sargent MD8640E 10BE 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 Sargent MD8640E 10BE?
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 Sargent MD8640E 10BE from ZenSupply?
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