Corbin Russwin 403F67-7 ML2000...
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$30.00
$24.74
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Corbin Russwin 403F67-7 ML2000 Series Auxiliary Latch Replacement Part for Mortise Locks

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Model: 403F67-7

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

$30.00
$24.74
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Corbin Russwin 403F67-7 ML2000 Series Auxiliary Latch Replacement Part for Mortise Locks

The Corbin Russwin 403F67-7 is a genuine OEM auxiliary latch replacement part designed for the ML2000 and ML2000HS Mortise Lock Series. Engineered for commercial-grade applications, this auxiliary latch ensures continued proper operation of compatible Corbin Russwin mortise lock assemblies. As an authentic manufacturer component, it is the recommended replacement for maintaining performance and integrity in ML2000 and ML2000HS series installations.

Key Features

  • Genuine OEM Replacement Part: Authentic Corbin Russwin component (Model 403F67-7) designed specifically for the ML2000 and ML2000HS Mortise Lock Series, ensuring exact fit and reliable function.
  • Auxiliary Latch Function: Provides the critical auxiliary latch mechanism that supports proper mortise lock operation, maintaining security and smooth door performance.
  • ML2000/ML2000HS Series Compatibility: Engineered exclusively for Corbin Russwin ML2000 and ML2000HS mortise lock assemblies, supporting direct drop-in replacement without modification.
  • Commercial-Grade Construction: Built to the same standards as the original Corbin Russwin hardware, suitable for demanding commercial door applications.
  • Precision Fit: Manufactured to original specifications to restore factory performance and extend the service life of existing ML2000 and ML2000HS mortise lock installations.

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: 403F67-7
  • Features: Corbin Russwin Lock Parts

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Hospitality and Hotel Properties
  • Retail and Mixed-Use Establishments
  • Multi-Tenant Residential and Apartment Complexes

Why Corbin Russwin 403F67-7?

Corbin Russwin is a trusted name in commercial door hardware, and the 403F67-7 auxiliary latch upholds that reputation as a genuine OEM replacement component for the ML2000 and ML2000HS Mortise Lock Series. Sourcing an authentic Corbin Russwin part ensures exact compatibility, preserves the integrity of the original installation, and supports reliable long-term performance in commercial environments where dependability is non-negotiable.

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:
403F67-7
Features:
Corbin Russwin Lock Parts

Corbin Russwin 403F67-7 – Frequently Asked Questions

1) Will the Corbin Russwin 403F67-7 auxiliary latch fit an ML2000 mortise lock?
Yes. The 403F67-7 is the genuine Corbin Russwin auxiliary latch made for the ML2000 and ML2000HS mortise lock series, and it drops into those lock bodies without modification. It is built for the ML2000 family only, so it is not a part to order for a different manufacturer's mortise case or for a tubular lockset.
2) My mortise lock latch won't stay retracted and the door pushes open - is the auxiliary latch the part to replace?
On an ML2000 or ML2000HS mortise case, the auxiliary latch is the small deadlatching plunger that rides against the strike and blocks the main latchbolt from being pushed back. If that plunger is worn, bent, or sticking, the lock stops deadlatching and the door can be forced. The 403F67-7 is the OEM auxiliary latch for that job on ML2000 and ML2000HS cases.
3) Can a Kwikset 84290 plainlatch be used in place of the Corbin Russwin 403F67-7 auxiliary latch?
No. The Corbin Russwin 403F67-7 is an auxiliary latch component that fits inside Corbin Russwin ML2000 and ML2000HS mortise lock bodies as a genuine OEM replacement part. The Kwikset 84290 is a square corner plainlatch with a 2-3/8 inch backset, which is a bored (cylindrical) door prep latch installed through a cross bore rather than a part that goes into a mortise lock case. The two are not interchangeable in either direction.
4) I need a latch for a 2-3/8 or 2-3/4 inch bored door prep, not a mortise case - what should I look at instead of the 403F67-7?
The 403F67-7 will not help you there; it is an internal auxiliary latch part for Corbin Russwin ML2000 and ML2000HS mortise lock bodies. For a bored prep with a selectable backset, the Deltana DLP23875 is a drive-in latch with an adjustable 2-3/8 inch or 2-3/4 inch backset in a passage/privacy function for doors 1-3/8 inch to 2 inch thick, and the Deltana DLE23875 is the entry-function drive-in latch for the same 1-3/8 inch to 2 inch door thickness range.
5) Is this an aftermarket part or a genuine Corbin Russwin component?
Genuine OEM. The 403F67-7 is an authentic Corbin Russwin replacement part made to original specifications for the ML2000 and ML2000HS series, which is what keeps the repaired lock functioning as the factory assembly did rather than introducing a fit mismatch inside the case.
6) Do I have to replace the whole mortise lock body, or just the auxiliary latch?
If the failure is in the auxiliary latch, you can rebuild rather than replace. The 403F67-7 is supplied as a single replacement part for ML2000 and ML2000HS cases and installs without modification to the lock, so the existing case, trim, cylinder and door prep all stay as they are.
7) Is the Corbin Russwin 403F67-7 a fire-rated latch like the Kwikset 83521?
They are rated and sold differently. The Kwikset 83521 is a RCAL plain latch carrying a UL 3 hour rating for BBL, KNL, CNL and PLL applications, and the Kwikset 83518 is the RCAL adjustable square drive version of that UL 3 hour latch. The Corbin Russwin 403F67-7 is a genuine OEM auxiliary latch component for the ML2000 and ML2000HS mortise lock series, so its rating follows the complete Corbin Russwin mortise lock assembly it is installed in rather than being rated as a standalone latch.
8) Is the Corbin Russwin 403F67-7 rated for commercial traffic, or is it a residential part?
It is a commercial component. The 403F67-7 is classified commercial and is built to the same standard as the original ML2000 hardware, which is why it turns up in office buildings, schools, hospitals, hotels, government facilities and multi-tenant residential where mortise locks are standard.
How fast can I get the Corbin Russwin 403F67-7 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 Corbin Russwin 403F67-7 come with a warranty?
Absolutely. The Corbin Russwin 403F67-7 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 Corbin Russwin 403F67-7?
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 Corbin Russwin 403F67-7 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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