Sargent 12-L980 Lockable Fire ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,290.86
$1,653.26
Sargent 12-L980 Lockable Fire Rated Steel Mullion with Gray Prime Coat Finish

Sargent 12-L980 Lockable Fire Rated Steel Mullion with Gray Prime Coat Finish

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Model: 12-L980 GRAY 86
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,290.86
$1,653.26
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Sargent Fire-Rated Steel Mullion 86" Height with Lockable Cylinder

Professional Fire-Rated Mullion Solution for Commercial Door Applications

The Sargent Fire-Rated Steel Mullion delivers ULC listed fire protection for commercial door installations requiring code compliance. This lockable steel mullion features 86" standard height with optional configurations up to 120" maximum height, accommodating 1 155/1239" standard cylinder size. Heavy-duty steel construction with gray prime coat finish provides structural integrity and field painting flexibility for demanding commercial environments.

Professional Features & Benefits

  • Fire-Rated Compliance: ULC listed fire-rated design ensures compliance with fire safety codes and building requirements for protected openings.
  • Flexible Height Options: Standard 86" height with optional configurations available up to 120" maximum height for various door frame applications.
  • Lockable Security: Accepts 1 155/1239" standard cylinder for keyed access control and security management.
  • Heavy-Duty Steel Construction: Durable steel material provides long-lasting performance and structural integrity in demanding commercial environments.
  • Versatile Application: Fire-rated design can also be used on non-fire rated openings, providing installation flexibility across different project requirements.
  • Professional Finish: Gray prime coat finish provides a neutral base suitable for field painting to match specific architectural requirements.
  • Manufacturer Warranty: 1-year limited warranty provides confidence and protection for commercial installations.

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 mullion products deliver professional-grade reliability with heavy-duty steel construction and ULC listed fire rating for demanding commercial applications. The 1-year limited warranty provides added confidence for professional installations. Engineered for dependable performance where fire safety compliance and security are essential requirements.

Product Specs

Product Group:
Exit Devices and Trim
Product Subgroup:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Type:
Mullions
Commercial/Residential:
Commercial
Parts and Accessories Type:
Installation Accessories
Product Attribute:
Parts and Accessories
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Sargent 12-L980 GRAY 86 – Frequently Asked Questions

1) What is a removable mullion like the Sargent 12-L980 for, and do I need one on a pair of doors?
A mullion is the vertical steel post that stands in the middle of a pair of doors, giving each leaf something to latch into. The Sargent 12-L980 is a lockable steel mullion, so you use it when you want to run rim exit devices on both leaves of a double door instead of vertical rod devices. It comes out when you need the full clear opening for moving equipment or furniture through, then locks back into place. If you cannot give up the center post at all, the alternative is a pair of vertical rod devices that latch at the head and sill with no mullion between them.
2) Can I use the Sargent 12-L980 mullion on a fire rated opening?
Yes. The 12-L980 is a ULC listed fire rated mullion, which is what a fire rated pair of doors with rim devices requires. It can also go on non fire rated openings, so if you are standardizing across a building you can spec the one mullion for both rated and unrated pairs rather than stocking two part numbers.
3) What is a cross-brand alternative to the Sargent 12-L980 steel mullion?
Stanley Security offers two Grade 1 mullions that serve the same pair-of-doors opening: the QRM111 from the QRM100 Series and the QRM311 from the QRM300 Series. The difference that decides the job is the fire rating and the lock: the Sargent 12-L980 is ULC listed fire rated and accepts a standard cylinder so the mullion itself can be keyed, and it is supplied in a gray prime coat for field painting. If the opening is a protected one and the specification calls for a fire rated, lockable mullion, stay with the 12-L980; the Stanley QRM111 and QRM311 are the alternatives to look at when a Grade 1 mullion is what the drawing asks for.
4) Is the Sargent 12-L980 mullion keyed, and what cylinder does it take?
It is the lockable version, so the mullion is released with a key rather than being pulled free by hand. It accepts a standard mortise cylinder, which you order separately along with the keying to match the rest of the building. Plan on specifying the cylinder length, cam and keyway with your order.
5) Do I get the exit devices or strikes with the Sargent 12-L980 mullion?
No. What ships is the steel mullion itself in the length and prime coat you order. The rim exit devices for each leaf, the strikes that mount to the mullion, and the cylinder for the lock are all ordered separately. Contractors bidding a double door opening should count all three on the takeoff, not just the mullion.
6) Stanley QRM111 or QRM311 - are those two the same mullion?
They are not the same part. The Stanley Security QRM111 is a standard Grade 1 mullion in the QRM100 Series, and the QRM311 is a standard Grade 1 mullion in the QRM300 Series - two separate series, so order by the exact part number rather than by the grade. Neither is interchangeable with the Sargent 12-L980 by part number either: the 12-L980 is the ULC listed fire rated steel mullion with a lockable cylinder and a gray prime coat finish. For a distributor filling against a submittal, the series designation is the identifier to match.
7) I need a mullion for a non-fire-rated pair of doors - do I have to buy the fire rated one?
You do not have to, but you can. The Sargent 12-L980 fire rated mullion is also usable on non-fire rated openings, so one part number covers both conditions across a building where some pairs are protected and some are not - useful when a property manager or facility buyer wants to standardize. If the opening is plainly non-rated and the spec simply calls for a Grade 1 mullion, the Stanley Security QRM111 or QRM311 are the standard-duty alternatives in that class.
8) What color does the Sargent mullion come in, and can I paint it to match my frames?
Gray prime coat only. That is a primer, not a finish coat, so it is meant to be field painted to match your frames or door color. If the mullion is going into a lobby or anywhere it will be seen, budget the paint labor; if it is a back of house or stair pair, most people leave it as primed.
9) Is the Sargent 12-L980 mullion heavy duty enough for a school or hospital entrance?
It is a heavy duty steel mullion built for commercial use, and it is listed for the traffic you see in schools, healthcare, government buildings, retail and multi tenant residential. Steel construction is the point here: the mullion takes the abuse when carts and gurneys clip the center of the opening, and it can be pulled and reset when a wide load has to come through.
How fast can I get the Sargent 12-L980 GRAY 86 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 12-L980 GRAY 86 come with a warranty?
Absolutely. The Sargent 12-L980 GRAY 86 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 12-L980 GRAY 86?
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 12-L980 GRAY 86 from ZenSupply?
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