Corbin Russwin 678F00-8LR Mort...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$581.00
$418.32
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Corbin Russwin 678F00-8LR Mortise Lock Body for Thumbpiece Exit Devices, Left Hand Reverse

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Model: 678F00-8LR

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

$581.00
$418.32
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Corbin Russwin 678F00-8LR Mortise Lock Body for Thumbpiece Exit Devices, Left Hand Reverse

The Corbin Russwin 678F00-8LR is a commercial-grade mortise lock body designed specifically for use with thumbpiece-style exit devices, including the ED5610 and ED5655 device series. Configured for Left Hand Reverse (LHR) door applications, this replacement part ensures proper mechanical integration with compatible Corbin Russwin exit device assemblies. Purpose-built for commercial environments, this mortise lock body delivers the reliable performance and precise fit expected from Corbin Russwin exit device components.

Key Features

  • Thumbpiece Exit Device Compatibility: Designed specifically for use with Corbin Russwin ED5610 and ED5655 thumbpiece exit devices, ensuring precise mechanical fit and reliable operation.
  • Left Hand Reverse Configuration: Factory-configured for Left Hand Reverse (LHR) handing, simplifying installation on appropriately handed door assemblies.
  • Mortise Lock Body Design: Engineered as a direct-replacement mortise lock body component for compatible exit device assemblies in commercial applications.
  • Commercial-Grade Construction: Built to Corbin Russwin's commercial quality standards for demanding, high-traffic door hardware environments.
  • Exit Device Parts Compatibility: Classified as a genuine Corbin Russwin exit device replacement part, maintaining the integrity and performance of the original device assembly.
  • Drop-In Replacement: Designed to integrate seamlessly with existing compatible exit device configurations, minimizing installation complexity during service or upgrade.

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: Exit Device Parts
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 678F00-8LR
  • Features: Corbin Russwin Exit Device 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 Corbin Russwin 678F00-8LR?

Corbin Russwin exit device parts are engineered to exacting commercial standards, delivering the precise fit and mechanical reliability that professional installers and facility managers require. The 678F00-8LR mortise lock body maintains the operational integrity of ED5610 and ED5655 thumbpiece exit device assemblies, making it the correct choice for service, repair, or replacement in demanding commercial door hardware applications.

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:
Exit Device Parts
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
678F00-8LR
Features:
Corbin Russwin Exit Device Parts

Corbin Russwin 678F00-8LR – Frequently Asked Questions

1) What does the 8LR suffix mean on the Corbin Russwin 678F00 mortise lock body?
The LR in 678F00-8LR means Left Hand Reverse. The body ships factory-configured for that handing, so it is not a field-reversible universal case. Stand outside the door: if the hinges are on your right and the door swings toward you, that opening is Left Hand Reverse and this is the correct part. A left hand, right hand, or right hand reverse opening needs the matching handed body instead.
2) I have a thumbpiece exit device that won't retract the latch anymore. Is replacing the mortise lock body the fix?
On ED5610 and ED5655 thumbpiece devices the mortise lock body is the case that carries the latch and the mechanism the thumbpiece drives, so a worn or seized body is the usual reason the latch stops retracting. The 678F00-8LR is the Left Hand Reverse replacement case for those devices and is built to drop into the existing device configuration without reworking the door prep.
3) Can I use the 678F00-8LR on a residential door or a rim exit device?
No on both counts. This is a commercial-rated mortise lock body, and it only pairs with Corbin Russwin ED5610 and ED5655 thumbpiece exit devices. A rim device latches into a surface strike and uses no mortise case, so this part has nothing to attach to there. It is intended for commercial traffic in offices, schools, healthcare, retail, industrial, multi-tenant residential and government buildings.
4) Do I need to order the thumbpiece trim separately from the mortise lock body?
Yes. The 678F00-8LR is the mortise lock body alone. The thumbpiece trim, the exit device chassis, and the strike are separate items, so if you are replacing more than the case itself, order those pieces alongside it. For a straight case swap on a working ED5610 or ED5655, the body is all you need.
5) Is this a genuine Corbin Russwin part or an aftermarket lock body?
It is a genuine Corbin Russwin exit device replacement part, model 678F00-8LR, so the interface with the thumbpiece trim and the device chassis matches the original assembly. For facilities standardized on Corbin Russwin ED5610 or ED5655 openings, that keeps the repaired door operating the same as the rest.
How fast can I get the Corbin Russwin 678F00-8LR 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 678F00-8LR come with a warranty?
Absolutely. The Corbin Russwin 678F00-8LR 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 678F00-8LR?
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 678F00-8LR 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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