Adams Rite MS1850A-320 - Deadb...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$92.00
$63.96
Adams Rite MS1850A-320 - Deadbolt 1Adams Rite MS1850A-320 - Deadbolt 1-1/8" Backset, Short Throw bolt, Flat Faceplate-1/8" Backset, Short Throw bolt, Flat Faceplate,

Adams Rite MS1850A-320 - Deadbolt 1Adams Rite MS1850A-320 - Deadbolt 1-1/8" Backset, Short Throw bolt, Flat Faceplate-1/8" Backset, Short Throw bolt, Flat Faceplate,

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Model: MS1850A-320-628
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$92.00
$63.96
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Adams Rite MS1850A-320 - Deadbolt 1-1/8" Backset, Short Throw bolt, Flat Faceplate

The Adams Rite MS1850A-320 is a heavy-duty mortise deadbolt designed for narrow stile aluminum storefront doors where a 1-1/8" backset and short-throw straight bolt are required. Engineered for commercial applications, it features Adams Rite's proven MS® deadlock design, providing dependable single-point locking with smooth key or thumbturn operation. The short-throw laminated stainless steel bolt delivers excellent security while accommodating installations that require reduced bolt travel. Compatible with standard Adams Rite MS® cam mortise cylinders and available with a flat faceplate, the MS1850A-320 is ideal for new construction, retrofit, and replacement projects in retail, office, institutional, and commercial storefront applications.

Professional Features & Benefits

  • Genuine Adams Rite MS® Series maximum security mortise deadlock
  • 1-1/8" backset for standard narrow stile aluminum storefront doors
  • Short-throw laminated stainless steel straight bolt for secure locking
  • Flat faceplate for standard storefront door preparations
  • Over-center deadlocking action helps resist prying and forced entry
  • Smooth key or thumbturn operation with 360° rotation
  • Accepts standard Adams Rite MS® cam mortise cylinders (sold separately)
  • Corrosion-resistant steel lock case for long service life
  • Ideal for commercial storefronts, offices, schools, healthcare, and institutional buildings
  • Direct replacement for compatible Adams Rite MS1850 Series deadlocks

Technical Specifications

  • Manufacturer: Adams Rite (ASSA ABLOY)
  • Part Number: MS1850A-320
  • Product Type: Mortise Deadlock
  • Series: MS1850A Maximum Security Deadlock
  • Backset: 1-1/8" (28.6 mm)
  • Bolt Type: Short-throw laminated stainless steel straight bolt
  • Faceplate: Flat
  • Operation: 360° key or thumbturn rotation
  • Cylinder Compatibility: Standard 1" mortise cylinder with Adams Rite MS® cam (sold separately)
  • Door Compatibility: Narrow stile aluminum storefront doors
  • Application: Commercial storefronts, retail entrances, office buildings, schools, healthcare, and institutional facilities

 

 

Manufacturer Resources

Adams Rite Product Catalog

Product Specs

Product Group:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
Product Category:
Parts and Accessories
Department:
Door Hardware
Product Type:
Parts and Accessories

Adams Rite MS1850A-320-628 – Frequently Asked Questions

1) Will the Adams Rite MS1850A-320 deadbolt fit a narrow stile aluminum storefront door?
That is exactly what the MS1850A-320 is built for. It is a mortise deadlock with a 1-1/8 inch (28.6 mm) backset, which is the standard narrow stile aluminum storefront prep. The lock case mortises into the stile of the door and the flat faceplate suits standard storefront preparations. On a wide stile aluminum or a hollow metal door with a 2-3/8 or 2-3/4 inch backset prep, this is the wrong bolt.
2) Does the Adams Rite MS1850A-320 come with a cylinder?
No cylinder is included. The MS1850A-320 takes a standard 1 inch mortise cylinder with an Adams Rite MS cam, ordered separately. If you are keying this into an existing building master system, order the cylinder in your keyway with the MS cam, not a standard mortise cam, or the tailpiece will not drive the bolt. A thumbturn can be used on the inside instead of a cylinder, since the lock operates with 360 degree key or thumbturn rotation.
3) What does the short throw bolt on the MS1850A-320 mean for my strike and jamb?
The short-throw straight bolt travels less than the long-throw MS bolt, so it is meant for openings where bolt travel has to be reduced, typically a single door into a jamb rather than a wide gap. The bolt itself is laminated stainless steel with over-center deadlocking action, which resists prying and forced entry. If your existing prep was cut for a long-throw hookbolt or a deep strike pocket, the short straight bolt will not reach the same engagement, so match the bolt style to the strike already in the frame.
4) Can the MS1850A-320 replace an existing Adams Rite MS1850 deadlock?
Yes, it is a direct replacement for compatible Adams Rite MS1850 Series deadlocks. The two things to confirm on the door you are pulling the old lock out of are the backset, which must be 1-1/8 inch, and the faceplate, which is flat on this model. If the outgoing lock had a beveled faceplate or a hookbolt, the case will drop in but the faceplate and strike will not line up the same way.
5) Will a GMS small format interchangeable core mortise housing work as the cylinder for an Adams Rite MS1850A-320 deadbolt?
No. The MS1850A-320 takes a standard 1 inch mortise cylinder fitted with the Adams Rite MS cam, and the cam is what drives the short-throw laminated stainless steel bolt in the 1-1/8 inch backset case. The GMS ICM7-ST is a Best SFIC straight mortise housing built for a 7-pin small format core and supplied with a Yale cam, so the cam geometry does not match the MS deadlock. If a facility is standardized on small format interchangeable cores such as the GMS IC7-26D 7-pin core or the IC6-26D 6-pin core, the core has to go into an MS-cam mortise cylinder housing rather than a Yale-cam housing for the deadbolt to throw.
6) Is a straight bolt deadlock the right choice for a pair of storefront doors, or do I need something else?
A straight bolt like the one in the MS1850A-320 throws into a strike in the jamb, which makes it a single-door or active-leaf lock. It is a single-point mortise deadlock, not a two-point or pair device. On a pair of aluminum doors with no mullion, the usual answer is a hookbolt version that catches the inactive leaf, or a separate device that latches top and bottom. Use this one where the bolt has a solid jamb or mullion to throw into.
7) Is the MS1850A-320 deadbolt rated for commercial traffic in a school or medical building?
It is a commercial-duty product, built as a maximum security MS Series mortise deadlock with a corrosion-resistant steel lock case, and it is applied to commercial storefronts, retail entrances, offices, schools, healthcare, and institutional facilities. For facility standardization, the thing to hold constant across your openings is the 1-1/8 inch backset and the flat faceplate, so replacement locks drop into the same prep building-wide.
8) What else do I need to order to finish an Adams Rite MS1850A-320 deadbolt installation?
Plan on three things beyond the lock body: a 1 inch mortise cylinder with an Adams Rite MS cam for the outside, a thumbturn or second cylinder for the inside, and a strike suited to the jamb the bolt throws into. The lock ships as the deadlock case and faceplate only. If you are cutting a new opening rather than replacing, the stile also has to be prepped for the 1-1/8 inch backset before the case will seat.
9) I need small format interchangeable core keying on my storefront deadbolt. Can I do that?
The MS1850A-320 accepts a standard 1 inch mortise cylinder with an Adams Rite MS cam, so an SFIC setup needs a mortise housing carrying the right cam plus a core. ZenSupply carries GMS SFIC mortise housings and 6-pin and 7-pin small format cores un-combinated, so the core can be pinned to your existing system. Confirm the housing cam matches the Adams Rite MS drive before you order the pair.
10) What should be used to secure a full glass door instead of an Adams Rite MS1850A-320 deadbolt?
The MS1850A-320 is a mortise deadlock, meaning it drops into a mortise pocket in the stile of a narrow stile aluminum storefront door; a full glass door with no aluminum stile has nowhere to take the lock case or the 1-1/8 inch backset prep. For that opening the hardware is a surface-applied glass door lock with its own strike prep, such as a Codelocks CL4000 or CL4500 glass door lock, which uses the CL4000-RSB glass door strike box to receive the bolt. Keep the MS1850A-320 for openings that actually have a stile to mortise into.
How fast can I get the Adams Rite MS1850A-320-628 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 Adams Rite MS1850A-320-628 come with a warranty?
Absolutely. The Adams Rite MS1850A-320-628 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 Adams Rite MS1850A-320-628?
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 Adams Rite MS1850A-320-628 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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