Sargent MD8646 Concealed Verti...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,990.78
$2,680.33
Sargent MD8646 Concealed Vertical Rod Exit Device with Storeroom Function and Freewheeling Trim

Sargent MD8646 Concealed Vertical Rod Exit Device with Storeroom Function and Freewheeling Trim

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Model: MD8646E 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 MD8646 Concealed Vertical Rod Exit Device with Storeroom Function and Freewheeling Trim

Professional Concealed Vertical Rod Exit Device Solution

The Sargent MD8646 is part of the proven 8600 Series concealed vertical rod exit devices, engineered for standard width stile applications on hollow metal doors. This storeroom function device features freewheeling trim and accommodates door thicknesses from 1-3/4" minimum to 2-1/4" maximum with 4-1/2" minimum stile width requirements. Designed for both single and double door applications with comprehensive rail sizing options for doors ranging from 24" to 48" widths.

Professional Features & Benefits

  • Door Thickness Compatibility: Accommodates 1-3/4" minimum to 2-1/4" maximum door thickness for versatile hollow metal door applications.
  • Stile Width Requirements: 4-1/2" minimum stile width ensures proper mounting and operation on standard commercial door frames.
  • Comprehensive Rail Sizing: Four rail sizes accommodate door widths from 24" to 48" - E Rail (24"-32"), F Rail (33"-36"), J Rail (37"-42"), and G Rail (43"-48") with factory cutting available.
  • Professional Strike System: Includes 650 Top Strike and 606 Bottom Strike rated for both panic and fire applications.
  • Stainless Steel Construction: Top bolt manufactured from stainless steel for enhanced durability and corrosion resistance.
  • Precise Installation Specifications: Device centerline positioned at 41" from finished floor for standard applications, 38" for elementary schools and accessibility compliance.
  • Flexible Dogging Options: Standard hex key dogging on non-fire rated devices, with optional cylinder dogging (#41 cylinder supplied) available.
  • Extensive Electric Options: Compatible with AL-Alarm, BT-Beacon, PL-SARGuide Photoluminescent, TL-SARGuide Illuminated Touchpad, and multiple monitoring/control systems including delayed egress and electric dogging.

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 width for proper rail selection.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces, ensuring proper device centerline positioning at 41" from finished floor.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions, accommodating center case dimensions of 8-3/8" x 2-5/8".
  4. Install 650 Top Strike and 606 Bottom Strike components, ensuring proper alignment with vertical rod mechanism and door opening height specifications.
  5. Mount the exit device using supplied machine screw fasteners and adjust rail length if factory cutting was not specified for exact door width.
  6. Test device operation to verify proper function including pushbar travel (3" neutral to 2-1/8" depressed), latching engagement, and dogging mechanism operation. 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 comprehensive rail sizing systems for precise door width compatibility. The series provides simplicity, strength, and durability with extensive electric option compatibility for advanced access control integration. Engineered for demanding commercial applications where dependable egress performance and code compliance are 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:
Storeroom
Grade:
Grade 1
Model Series:
MD8600 Series
Product Model:
MD8646
Product Function:
Storeroom
Product Category:
Exit Devices and Trim
Collection:
MD8600 Series
Department:
Door Hardware

Sargent MD8646E 10BE – Frequently Asked Questions

1) How do I pick the right rail length for my door width on the Sargent MD8600 concealed vertical rod device?
Rail selection goes by door width, and there are four: E Rail for 24 to 32 inch doors, F Rail for 33 to 36 inches, J Rail for 37 to 42 inches, and G Rail for 43 to 48 inches. Factory cutting is available if you want it sized exactly to the opening; otherwise you adjust rail length in the field. Orderable sizes are 32, 36, 42, and 48 inches, which map to those four rails.
2) What does storeroom function mean on the MD8646, and what happens on the outside lever?
Storeroom means the outside lever is always locked. You key it to retract the latch and get in; the lever itself never unlocks and stays locked after entry. Push the pad from the inside and you always get free egress. On the MD8646 the outside trim is freewheeling, so the lever rotates without engaging anything when it is locked, which protects the trim from being forced or wrenched.
3) Do I have to specify handing when ordering the Sargent MD8646?
Yes, handing is required and there is no field-reversible option here. You choose RHR (right hand reverse) or LHR (left hand reverse). Stand outside the door: if it is an outswinging door and the hinges are on your right, it is RHR. Exit devices are on outswinging doors, so the handing is always one of the two reverse hands. Get this wrong and the trim and latch will not work on your opening.
4) Should I use a concealed vertical rod device or a rim device on my opening?
The concealed vertical rod MD8646 latches at the head and the sill through rods hidden inside the door, so it secures a pair of doors with no center mullion and leaves nothing exposed to catch carts or vandalism. The tradeoff is that the door has to be prepped for concealed rods, which effectively means factory-prepped hollow metal. A rim device mounts entirely on the door face and is far easier to retrofit into an existing door, but on a pair it needs a removable mullion or an overlapping astragal. If the door is already hung and unprepped, go rim.
5) Can I dog the Sargent MD8600 device down so the door stays push-pull during business hours?
Hex key dogging is standard on non-fire rated MD8600 devices, which holds the pad depressed and the latches retracted for free push-pull operation. If you want staff to dog it with a key instead of a hex wrench, order the cylinder dogging option, which comes with a #41 cylinder. Electric dogging is also available as option 58, and 56 gives you remote dogging / latch retraction. Note that fire rated devices cannot be dogged at all.
6) What is the closest alternative to the Sargent MD8646 if my door has a narrow aluminum stile?
The MD8646 needs 4-1/2 inches of stile and is built for hollow metal, so it is not the answer on a narrow aluminum storefront stile. The Adams Rite 8400 Series is a narrow stile life-safety mortise exit device made specifically for aluminum doors. The Von Duprin 55 Series (5575) is another narrow stile Grade 1 mortise device, field reversible, though it uses a crossbar rather than a push pad. Both are surface-mounted mortise devices, not concealed vertical rod, so they latch into the jamb rather than head and sill.
7) I need a fire rated mortise exit device for a wood door. Is the Sargent MD8646 the right pick?
No. The MD8646 is specified for hollow metal doors. For a wood door on a labeled opening, the Adams Rite 3300 Series is a Grade 1 fire rated mortise exit device listed for both wood and hollow metal. If the opening does not need a fire label, the Adams Rite 8300 Series is the wide stile non-fire-rated equivalent for wood and hollow metal. Several of the Von Duprin wide stile mortise devices are explicitly not wood door compatible, so check that before you spec one on wood.
8) Can I substitute a Von Duprin 9875 or 8875 for the Sargent MD8646?
Not on the same opening without rework. The Von Duprin 9875-3FT and 8875-3FT are wide stile mortise exit devices, Grade 1, non-handed, for 1-3/4 inch doors and not rated for wood doors. The Sargent MD8646 is a narrow stile concealed vertical rod device that must be ordered handed as RHR or LHR and covers 1-3/4 inch through 2-1/4 inch door thickness. A wide stile device also needs the stile width to suit; the MD8646 works down to a 4-1/2 inch stile.
9) Is the Corbin Russwin ED5600AL a direct swap for the Sargent MD8646 storeroom function?
The functions differ. The Corbin Russwin ED5600AL is listed exit only or for use with classroom or passage lever trim, which is not sold with the device. The Sargent MD8646 is a storeroom function device with freewheeling trim, and the ET lever trim is selected with the device in A, B, E, F, J, L, P or W lever styles. The ED5600AL is also a wide stile device for 1-3/4 inch doors, while the MD8646 is narrow stile and covers 1-3/4 inch to 2-1/4 inch.
10) Where should the exit device centerline be mounted off the finished floor?
Standard mounting puts the MD8646 centerline at 41 inches above finished floor. For elementary schools and accessibility-driven installs, drop it to 38 inches. Also plan the door prep around a center case of 8-3/8 x 2-5/8 inches. Pushbar travel runs 3 inches at neutral to 2-1/8 inches depressed, which is the clearance you need to leave in front of the bar.
11) Does the Sargent MD8646 come with the top and bottom strikes, or do I order those separately?
Both strikes are included: a 650 top strike and a 606 bottom strike, and they are rated for panic and fire applications. The top bolt is stainless steel. Mounting hardware is machine screw fasteners, supplied. What is not included is the outside trim if you select the None option, and any electric option you want has to be called out on the order.
12) What lever styles can I get with the MD8646 ET trim, and can I order the device without trim?
ET trim is offered in eight lever designs: A, B, E, F, J, L, P, and W. If you already have trim on the opening or the door is exit only on the outside, choose the Exit Device Only option and no trim ships. All of it is freewheeling ET trim on this model, so the lever turns freely when locked.
13) Is the Sargent MD8646 Grade 1, and is it approved for a fire door?
The MD8646 is a Grade 1 commercial device, which is the highest ANSI/BHMA durability tier and what most institutional specs call for. On fire doors, the supplied 650 top strike and 606 bottom strike are rated for both panic and fire applications, and dogging is only standard on non-fire rated devices. Confirm the specific fire label configuration against the Sargent catalog before releasing a labeled opening.
14) What wide stile mortise exit device should I use instead if my door has a wide stile?
Wide stile mortise options ZenSupply carries include the Von Duprin 9875 (36 inch, Grade 1, non-handed, smooth case) and the Von Duprin 8875 crossbar version, both listed for hollow metal rather than wood. The Corbin Russwin ED5600AL is a Grade 1 three hour fire rated wide stile mortise device for 1-3/4 inch doors that accepts passage or classroom lever trim, sold exit only. The Falcon 25-M-EO is a 36 inch wide stile Grade 1 exit only device for 1-3/4 inch doors. Note these are handed or non-handed per model and none of them are concealed vertical rod, so they will not latch a pair without a mullion the way the MD8646 does.
15) If I only need free egress and no outside entry, is there a cheaper exit only device than the MD8646?
Yes. The MD8646 is built around keyed storeroom entry and freewheeling ET lever trim, which is cost you do not need if nobody comes in through that door. For exit only, the BEST Precision 2301 Series is a mortise exit device with heavy wrought construction sold exit only, the Detex 30 Series Advantex is a Grade 1 device-only mortise unit, and the Falcon 25-M-EO is a 36 inch Grade 1 exit only for 1-3/4 inch doors. You can also order the MD8646 itself with the Exit Device Only trim option if you want to stay in the Sargent 8600 platform and add trim later.
16) For a high-abuse opening, is there a mortise exit device tougher than the Sargent MD8646 touchpad rail?
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 cart and equipment strikes; it is not fire rated. The BEST Precision 2301 is an exit only mortise device with heavy wrought construction. The Sargent MD8646 is a Grade 1 narrow stile device with a stainless steel top bolt and a pushbar travel of 3 inches neutral to 2-1/8 inches depressed.
17) Which mortise exit device should I pick if I want a crossbar look rather than the Sargent MD8646 touchpad?
The Von Duprin 5575-3ft is a narrow stile crossbar mortise lock exit device, Grade 1, field reversible, for 1-3/4 inch doors and not fire rated. The Von Duprin 8875-3FT is the wide stile crossbar equivalent at 36 inches, Grade 1 and non-handed. The Sargent MD8646 uses a pushbar rail offered in 32, 36, 42 and 48 inch sizes.
18) I need to match the finish on the rest of the doors in the building. What finishes does the Sargent MD8600 exit device come in?
Twelve finishes, which covers most standardization programs: 03 bright brass and 04 satin brass (both clear coated), 09 bright bronze and 10 satin bronze (clear coated), three dark oxidized satin bronzes (10B oil rubbed, 10BE, 10BL clear coated), 20D dark statuary bronze lacquered, 32 bright stainless and 32D satin stainless, plus BSP black suede powder coat and WSP white suede powder coat. 32D satin stainless is the usual commercial default.
How fast can I get the Sargent MD8646E 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 MD8646E 10BE come with a warranty?
Absolutely. The Sargent MD8646E 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 MD8646E 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 MD8646E 10BE from ZenSupply?
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