Arrow 124 5A Deadlatch Replace...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$51.66
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Arrow 124 5A Deadlatch Replacement Part, MK Series, 2-3/4" Backset, 2-1/4" x 1-1/8" Face, Square Corner

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Model: 124 5A

In Stock (leaves warehouse same day if ordered before 3pm ET)

$51.66
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Arrow 124 5A Deadlatch Replacement Part, MK Series, UL Listed, 2-3/4" Backset, Square Corner, Antique Brass

The Arrow 124 5A is a commercial-grade deadlatch replacement part designed for the MK Series, offering precise compatibility and reliable latching performance for professional door hardware applications. Featuring a 2-3/4" backset and a 2-1/4" x 1-1/8" face plate with a square corner configuration, this deadlatch component integrates seamlessly into supported MK Series lock assemblies. UL Listed for verified safety and quality standards, this Antique Brass finish replacement part is well-suited for commercial environments requiring dependable hardware maintenance solutions.

Key Features

  • Precise Backset Dimension: 2-3/4" backset measurement ensures accurate fit and proper door alignment for MK Series applications.
  • Defined Face Plate Size: 2-1/4" x 1-1/8" face plate dimensions provide a clean, professional installation in compatible door preps.
  • Square Corner Configuration: Square corner face plate design for standard commercial door hardware cutouts and strike plate compatibility.
  • MK Series Compatibility: Engineered specifically for the Arrow MK Series lock family, ensuring proper fit and function as a replacement latch component.
  • UL Listed: Carries UL listing for verified performance and compliance with recognized safety standards.
  • Antique Brass Finish: Antique Brass finish coordinates with matching Arrow MK Series hardware for a consistent aesthetic appearance.
  • Commercial-Grade Construction: Designed for commercial applications where durable, reliable latching performance is required during hardware servicing or upgrades.

Certifications & Compliance

  • UL Listed
  • Commercial Grade

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Latches
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 124 5A
  • Features: Arrow Parts

Typical Applications

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

Why Arrow MK Series?

Arrow MK Series replacement parts are engineered to maintain the performance and integrity of installed commercial door hardware, with UL Listed components that meet recognized safety and quality benchmarks. The 124 5A deadlatch delivers the precise dimensional specifications, including the 2-3/4" backset and 2-1/4" x 1-1/8" square corner face, required for accurate, reliable servicing of Arrow MK Series lock assemblies in demanding commercial environments.

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Latches
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
124 5A
Features:
Arrow Parts

Arrow 124 5A – Frequently Asked Questions

1) Will the Arrow 124 5A drop into my existing latch mortise without recutting the door edge?
If the door edge is cut square, yes. The 124 5A uses a 2-1/4 inch by 1-1/8 inch faceplate with square corners, which matches a standard chiseled square-corner mortise. If your current latch has radius (rounded) corners, the square plate will leave uncut wood at the corners and you will need to square the mortise out with a chisel, or order a radius-corner latch instead.
2) Is the Arrow 124 5A latch compatible with locks other than the Arrow MK Series?
It is specified for the Arrow MK Series lock family as a replacement latch component. Don't plan on using it inside another manufacturer's lockset or another Arrow line, since the tailpiece and hub engagement are matched to MK Series chassis. For a like-for-like service replacement on an MK Series cylindrical lock, this is the part.
3) Is this a deadlatch or a plain latch, and does that matter for an entry door?
It is a deadlatch, meaning it has the auxiliary deadlocking plunger alongside the latchbolt that blocks the bolt from being carded or shimmed once the door is closed against the strike. That is what you want on any exterior or tenant entry opening. A plain latch, like Kwikset's 83521 or 84290 plainlatch, has no deadlocking plunger and is for passage or interior use where security isn't the point.
4) What is the difference between the Arrow 124 5A deadlatch and the Kwikset 84290 square corner plainlatch?
Both are square corner latch replacements, but they differ in backset and in what they lock into. The Arrow 124 5A is a deadlatch built for Arrow MK Series lock assemblies with a 2-3/4 inch backset and a 2-1/4 inch by 1-1/8 inch square corner face. The Kwikset 84290 is a plainlatch with a 2-3/8 inch backset and a square corner face. A plainlatch has no deadlocking plunger, so it is not an equivalent when the opening needs a deadlatch to resist carding; and the 2-3/8 inch backset means the door bore center sits closer to the edge than the Arrow requires.
5) Which latch options carry a UL listing for a fire rated opening?
The Arrow 124 5A deadlatch is UL Listed and specified for commercial use. Among the alternatives, the Kwikset 83518 is a UL 3 hour adjustable square drive latch, the Kwikset 83521 is a UL 3 hour plain latch for BBL, KNL, CNL and PLL trim, and the Kwikset 84290 square corner plainlatch is also UL. If you are chasing a specific hourly rating on a labeled door, the Kwikset 3 hour parts state the duration; the Arrow part is the one to use when the assembly it serves is an Arrow MK Series lock.
6) What finish does the Arrow 124 5A come in, and will it show once installed?
It is supplied in 609 Antique Brass, which is the finish on the faceplate and latch front, the only part visible on the door edge. If the MK Series lever or knob on that door is a different finish, the edge plate will not match. Order the latch finish to match the lock trim on the opening.
7) Is the Arrow 124 5A a drive-in latch?
No. It has a 2-1/4 inch by 1-1/8 inch faceplate, which means it mounts into a chiseled mortise on the door edge and screws through the plate. A drive-in latch has a collar instead of a plate and taps straight into the bored hole with no mortise. Deltana's DLE23875 entry and DLP23875 passage/privacy latches are the drive-in style if your door edge has no mortise cut.
8) Is the Emtek 83228 faceplate a substitute for the Arrow 124 5A?
No. The Emtek 83228 is a faceplate and screws only, for a tubular pocket door privacy latch with square corners - it supplies the trim plate, not the latching mechanism. The Arrow 124 5A is a complete deadlatch unit with a 2-3/4 inch backset and a 2-1/4 inch by 1-1/8 inch square corner face for Arrow MK Series locks. If your latch body is fine and only the plate is damaged, a faceplate-only part is the right category; if the latch itself failed, you need the full deadlatch.
9) Can I use the Emtek LC9-DBLTCH in place of the Arrow 124 5A deadlatch?
No - they do different jobs. The Emtek LC9-DBLTCH is a motorized deadbolt latch in the EMPowered series, meaning it is driven electrically as part of a deadbolt, and it needs the power and control that platform expects. The Arrow 124 5A is a mechanical deadlatch that latches when the door closes and is retracted by the Arrow MK Series lock trim. Use the Arrow part for a keyed or lever-operated MK Series latch replacement, and the Emtek part only where an electrified deadbolt is being serviced.
10) Does the Arrow 124 5A include a strike plate or screws?
The 124 5A is sold as the deadlatch unit itself, the latch case and its 2-1/4 x 1-1/8 square corner face. Plan on reusing the existing strike in the frame, or ordering a strike separately if the frame prep is being changed. Emtek's 83228 is an example of a faceplate-and-screws kit sold on its own, if you only need the cosmetic plate replaced on a different lock.
How fast can I get the Arrow 124 5A 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 Arrow 124 5A come with a warranty?
Absolutely. The Arrow 124 5A 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 Arrow 124 5A?
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 Arrow 124 5A 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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