Sargent NB8740 Dummy Function ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,607.89
$2,421.96
Sargent NB8700 Series - (NB8740) Dummy Function With Freewheeling Trim Wide Stile Grade 1 Surface Vertical Rod Exit Device

Sargent NB8740 Dummy Function Surface Vertical Rod Exit Device with Freewheeling Trim Wide Stile Grade 1

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Model: NB8740E 10BE
From the NB8700 Series Collection
$3,607.89
$2,421.96
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,607.89
$2,421.96
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Sargent NB8740 Dummy Function Surface Vertical Rod Exit Device with Freewheeling Trim Wide Stile Grade 1

Professional Grade 1 Surface Vertical Rod Exit Device Solution

The Sargent NB8740 is a dummy function surface vertical rod exit device from the NB8700 Series, featuring freewheeling trim and wide stile design. This Grade 1 exit device accommodates wood or metal doors from 1-3/4" thick, with door widths ranging from 24" to 48" across multiple rail configurations. The device requires a minimum 4-1/2" stile with trim and 3-1/2" minimum stile without trim, providing versatile installation options for commercial applications.

Professional Features & Benefits

  • Door Compatibility: Designed for wood or metal doors 1-3/4" thick with wide stile configuration requiring 4-1/2" minimum stile with trim.
  • Flexible Door Width Options: Multiple rail configurations accommodate door widths from 24" to 48" including E Rail (24" to 32"), F Rail (33" to 36"), J Rail (37" to 42"), and G Rail (43" to 48").
  • Grade 1 Construction: Professional-grade durability and performance meeting the highest commercial standards for heavy-duty applications.
  • Top Latch Design: Surface vertical rod configuration provides reliable latching with freewheeling trim functionality for smooth operation.
  • Dummy Function Operation: Non-latching trim design allows for consistent appearance while maintaining exit device functionality on the active leaf.
  • No-Cut Installation: Rails require no cutting for standard door sizes including 32", 36", 42", and 48" doors for simplified installation.
  • Versatile Applications: Suitable for both rated and non-rated openings in commercial environments requiring reliable egress solutions.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and/or frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  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 NB8700 Series exit devices deliver professional-grade reliability with Grade 1 construction designed for demanding commercial applications. The series provides the optimal combination of simplicity, strength, durability, and aesthetics with proven performance in both rated and non-rated openings. Engineered for demanding commercial applications where dependable egress performance is essential.

Product Specs

Series:
NB8700 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:
Wide Stile
Lock Function:
Dummy
Grade:
Grade 1
Model Series:
NB8700 Series
Product Model:
NB8740
Product Function:
Dummy
Product Category:
Exit Devices and Trim
Collection:
NB8700 Series
Department:
Door Hardware

Sargent NB8740E 10BE – Frequently Asked Questions

1) What does the dummy function on the Sargent NB8740 actually do?
Dummy means the NB8740 does not latch or release anything. The push rail and the freewheeling lever trim are there for appearance and pull only, so the inactive leaf of a pair matches the active leaf that carries a real device. If you need the door to latch and be released by the push rail, a dummy is the wrong function.
2) What is the minimum stile width for a Sargent NB8740 exit device?
4-1/2 inches of stile if you are mounting lever trim, 3-1/2 inches if you order the device without trim. Measure the lock stile on the actual leaf before you commit, because aluminum storefront stiles frequently fall under both numbers.
3) Which rail length do I order for my door width on the Sargent NB8700 Series?
Rail selection follows door width: E Rail covers 24 to 32 inches, F Rail 33 to 36 inches, J Rail 37 to 42 inches, and G Rail 43 to 48 inches. Orderable sizes are 32, 36, 42 and 48 inches, and at those four standard widths the rail needs no cutting in the field.
4) Do I need to specify handing on the Sargent NB8740?
Yes, handing is required at order. The NB8740 is built either RHR (right hand reverse) or LHR (left hand reverse). Stand outside the opening: if the door swings toward you and the hinges are on your right, it is RHR. Get this wrong and the trim and top latch will not line up with the leaf.
5) Which comparable mortise exit devices are fire rated if my opening requires a labeled device?
For a labeled opening, the Adams Rite 3300 Series is a fire-rated Grade 1 wide stile mortise exit device for wood and hollow metal doors, and the Corbin Russwin ED5600AL is a Grade 1 3-hour fire rated mortise exit device. By contrast the Adams Rite 8300 and 8400 Series, the Von Duprin 5575, 8875, 9875 and 9475/9575 are all listed with no fire rating, so they are life-safety and panic applications rather than labeled fire doors.
6) The Sargent NB8740 is for a wide stile door. What mortise exit device should I use on a narrow stile aluminum storefront instead?
The NB8740 is a wide stile device needing a 4-1/2 inch minimum stile with trim and 3-1/2 inch without trim, which a typical aluminum storefront stile will not give you. For narrow stile aluminum doors, the Adams Rite 8400 Series is a Grade 1 narrow stile mortise exit device built for aluminum doors, and the Von Duprin 5575-3ft is a Grade 1 narrow stile crossbar mortise device for 1-3/4 inch doors that is field reversible.
7) What is the closest Grade 1 wide stile mortise exit device to the Sargent NB8740 if I need lever trim that actually retracts a latch?
The NB8740 is a dummy function device with freewheeling trim, so the ET lever trim turns without operating a latch. If the opening needs lever trim that retracts a latch from the outside, the Corbin Russwin ED5600AL is a Grade 1 wide stile mortise exit device for 1-3/4 inch doors that accepts passage or classroom lever trim (trim ordered separately). Both are Grade 1 wide stile devices, so the stile and door thickness situation is comparable; the difference is dummy trim versus working lever trim.
8) My opening is a wood door. Which of the wide stile mortise exit devices comparable to the Sargent NB8740 will not work?
The Sargent NB8740 is built for wood or metal doors 1-3/4 inch thick. Among the Grade 1 wide stile comparables, the Von Duprin 8875-3FT, the Von Duprin 9875-3FT and the Detex 30 Series Advantex are all listed as not wood door compatible, so they are metal-door devices. The Adams Rite 3300 and 8300 Series are Grade 1 wide stile mortise devices listed for wood and hollow metal doors, and the Corbin Russwin ED5600AL is a Grade 1 wide stile device for 1-3/4 inch doors.
9) Can the Sargent NB8740 go on a wood door?
Yes, wood or metal doors at 1-3/4 inches thick. That matters when you are comparing options: the Von Duprin 8875, 9875 and the Detex 30 Series are all listed as not wood door compatible.
10) Can I order the Sargent NB8740 without lever trim?
Yes. Trim is a separate choice, and Exit Device Only is one of the options. If you do want lever trim, the ET series is offered in A, B, E, F, J, L, P and W lever designs, so you can match the lever style already running through the building.
11) Why does a dummy exit device use surface vertical rods?
On the NB8740 the rods and top latch keep the hardware profile and rail height identical to the latching device on the adjacent leaf, so a pair of doors reads as a matched set. The function itself is dummy, so the rods are not doing security work. If you want the inactive leaf to actually latch top and bottom, you need a latching SVR device, not this one.
12) I only need exit-only hardware, no trim at all. What is a simpler alternative to the Sargent NB8740?
The NB8740 can be ordered as exit device only without ET trim, but if you want a device built as exit only from the start, the Falcon 25-M-EO is a Grade 1 wide stile mortise exit device for 1-3/4 inch doors in a 36 inch, 3 ft size, the BEST Precision 2301 is a mortise exit device supplied exit only with heavy wrought construction, and the Detex 30 Series Advantex is a Grade 1 wide stile mortise device supplied as device only. None of those carry the freewheeling ET lever trim that the NB8740 offers.
13) How does the Sargent NB8740 differ from a Von Duprin crossbar device like the 8875?
The Von Duprin 8875-3FT is a wide stile crossbar mortise exit device, Grade 1, 36 inch, non-handed, for 1-3/4 inch doors and not wood door compatible. The Sargent NB8740 is a push-rail style device that must be ordered handed as RHR or LHR, comes in 32, 36, 42 and 48 inch rail sizes, and suits wood or metal doors. If the building is standardizing on crossbar appearance across its openings, the 8875 is the look to match; if the rest of the doors carry push rails, the NB8740 is the closer visual match.
14) I need a device for a high abuse opening where the push pad gets hit hard. Is there an alternative to the Sargent NB8740?
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 pad set back from the face of the device. The Von Duprin 9875-3FT is a Grade 1 wide stile smooth case mortise device for 1-3/4 inch doors, non-handed. Both are non fire rated. The Sargent NB8740 is a Grade 1 wide stile device that must be specified handed as RHR or LHR and is offered with freewheeling ET lever trim, which spins freely rather than being forced.
15) Is the Adams Rite 8300 a direct substitute for the Sargent NB8740?
They overlap but are not identical. Both are Grade 1 wide stile mortise exit devices, and the Adams Rite 8300 Series is a life-safety device for wood and hollow metal doors, the same door materials the NB8740 covers at 1-3/4 inch thickness. The 8300 Series is listed as not fire rated, while the NB8740 is offered for rated and non-rated openings. The NB8740 also carries the dummy function with freewheeling ET lever trim in eight lever designs, so if the freewheeling dummy trim is what the spec calls for, the 8300 is not a like-for-like swap.
16) What finishes does the Sargent NB8740 come in for matching existing hardware?
Twelve finishes: 03 bright brass, 04 satin brass, 09 bright bronze, 10 satin bronze, 10B dark oxidized satin bronze oil rubbed, 10BE, 10BL, 20D dark statuary bronze, 32 bright stainless, 32D satin stainless, plus BSP black and WSP white suede powder coat. 32D is the usual pick for standardizing across a commercial facility.
17) Is the Sargent NB8740 heavy duty enough for a school or hospital corridor?
It is Grade 1, the heaviest ANSI/BHMA duty classification for exit devices, and the NB8700 Series is a commercial line used in offices, schools, healthcare, retail, industrial, multi-tenant residential and government buildings.
How fast can I get the Sargent NB8740E 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 NB8740E 10BE come with a warranty?
Absolutely. The Sargent NB8740E 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 NB8740E 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
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