Corbin Russwin 129F84-8 Mortis...
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Corbin Russwin 129F84-8 Mortise and Rim Cylinder Nut Replacement Part

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Model: 129F84-8

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

$21.98
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Corbin Russwin 129F84-8 Mortise and Rim Cylinder Nut Replacement Part

The Corbin Russwin 129F84-8 is a genuine OEM cylinder nut designed as a direct replacement component for Corbin Russwin mortise and rim cylinder assemblies. This commercial-grade replacement part ensures proper cylinder retention and secure mounting within compatible Corbin Russwin lock hardware, maintaining the integrity and performance of the original installation. Sourced directly from Corbin Russwin, this part is engineered to exact manufacturer specifications for reliable, long-lasting service in commercial door hardware applications.

Key Features

  • Genuine OEM Replacement Part: Manufactured by Corbin Russwin to exact original specifications, ensuring proper fit and function within compatible mortise and rim cylinder assemblies.
  • Mortise and Rim Cylinder Compatibility: Designed specifically for use with Corbin Russwin mortise and rim cylinder configurations, supporting versatile application across multiple lock types.
  • Commercial-Grade Construction: Built to the quality standards expected in commercial door hardware environments, providing dependable performance in demanding, high-traffic settings.
  • Secure Cylinder Retention: Functions as the cylinder nut to securely retain the cylinder within the lock body, maintaining alignment and operational integrity of the cylinder assembly.
  • Direct Drop-In Replacement: Engineered as a true replacement for the original component, minimizing installation time and reducing the need for modifications to existing hardware.

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: Cylinders
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 129F84-8
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

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

Why Corbin Russwin 129F84-8?

Corbin Russwin cylinder parts are manufactured to the same exacting standards as original equipment, ensuring seamless compatibility and reliable performance in commercial lock assemblies. Choosing a genuine Corbin Russwin replacement component like the 129F84-8 cylinder nut preserves the function and longevity of your existing hardware investment, making it the preferred choice for facility managers, locksmiths, and door hardware professionals.

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:
Cylinders
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
129F84-8
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 129F84-8 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 129F84-8 part?
It's the cylinder nut used to retain a cylinder in Corbin Russwin mortise and rim cylinder assemblies. Not a cylinder, not a core, not a key blank, just the retaining nut that holds the cylinder in place and keeps it aligned in the lock body. Model number is 129F84-8, supplied as a genuine Corbin Russwin OEM part.
2) Will the 129F84-8 nut work on both mortise and rim cylinders?
Yes. Corbin Russwin lists the 129F84-8 for use with both mortise and rim cylinder configurations on their hardware, so one part covers either setup rather than needing a separate nut per cylinder type.
3) Can I use this nut on a Schlage or BEST cylinder?
No. The 129F84-8 is a Corbin Russwin OEM component made for Corbin Russwin mortise and rim cylinder assemblies. For a Schlage rim application you'd be looking at a Schlage rim cylinder such as the 20-021 (vertical tailpiece cam) or 20-022 (horizontal cam), and BEST interchangeable core work uses BEST's own housings like the 1CB. Mixing a Corbin retaining nut onto another maker's cylinder is not a fit the manufacturer supports.
4) Is the Corbin Russwin 129F84-8 a cylinder, or just the retaining nut?
The 129F84-8 is the cylinder nut only - a genuine OEM replacement component that retains a Corbin Russwin mortise or rim cylinder in the lock body. It is not a keyed cylinder. If the cylinder itself needs replacing, complete cylinders are a different class of part: the Schlage Commercial 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam, and the Adams Rite 4036 is a Grade 1 mortise cylinder. Order the 129F84-8 when the keying and the cylinder are fine and only the mounting nut is stripped, missing, or cross-threaded.
5) We are replacing the whole rim cylinder on an exit device instead of just the nut - what should we look at?
When the cylinder itself is being swapped rather than its retaining nut, you move from the 129F84-8 nut to a complete rim cylinder. The Schlage Commercial 20-021 is a 6-pin rim cylinder supplied with a vertical tailpiece cam and two keys, and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam - the cam orientation is dictated by the device you are mounting to. The 129F84-8 remains the correct order only when you are keeping the existing Corbin Russwin cylinder in place.
6) Our facility wants to move to interchangeable cores - does the 129F84-8 get us there?
No. The 129F84-8 is a replacement nut that retains a conventional Corbin Russwin mortise or rim cylinder; it does not convert an opening to an interchangeable core system. Small format interchangeable core options include the BEST 1CB 150 Series interchangeable core cylinder and the BEST 1CDF drill resistant patented 7-pin brass interchangeable core, and on the full size side the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. Those are system changes; the 129F84-8 is a like-for-like repair part.
7) Is this an aftermarket nut or the real Corbin Russwin part?
Genuine OEM, sourced from Corbin Russwin and built to the original specification, so it drops into the existing hardware without filing, shimming, or other modification.
8) I lost the retaining nut pulling a Corbin Russwin cylinder, do I have to buy a whole new cylinder?
No. The nut is sold on its own as part 129F84-8, so you can replace just the retaining hardware and keep the existing cylinder and keying intact.
9) Can I use another brand's cylinder part in place of the Corbin Russwin 129F84-8?
The 129F84-8 is built to Corbin Russwin's original specifications for Corbin Russwin mortise and rim cylinder assemblies, so it is matched to that hardware rather than to other manufacturers' cylinder families. Other brands' cylinder parts are tied to their own platforms in the same way - the Adams Rite 4024 and 4025 cylinder pulls are specified for the Adams Rite MS1847 deadlock/deadlatch, the 4026 for the Adams Rite 5017 wood door deadlock, and the Kaba Ilco 1579 knob and lever cylinder is built for Sargent locks. For Corbin Russwin cylinder hardware, stay with the 129F84-8.
10) The lock is a key-in-lever, not a mortise lock - is the 129F84-8 still the right part?
The 129F84-8 is specified for Corbin Russwin mortise and rim cylinder assemblies, so a key-in-knob or key-in-lever housing is a different build. Cylinders made for that style include the Falcon A23161-05 G key in lever cylinder with a 6-pin G keyway keyed different and two cut keys, the Kaba Ilco 1539 key-in-knob/lever universal cylinder, and the Kaba Ilco 1599 key-in-knob replacement cylinder. Confirm whether the cylinder in the door is mortise or rim threaded before ordering the 129F84-8 nut.
11) We need a deadbolt cylinder for a residential-style handleset - does the 129F84-8 apply?
No. The 129F84-8 is a commercial cylinder nut for Corbin Russwin mortise and rim cylinder hardware. Deadbolt and handleset cylinders are a separate group: the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, and the 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece. Those are chosen by the lock they retrofit, not by the nut thread.
12) Is the 129F84-8 suitable for high-traffic commercial doors, or is it a residential part?
It's a commercial part. Corbin Russwin builds it to commercial door hardware standards, and the typical uses are office buildings, schools, hospitals, retail, government facilities, warehouses, and multi-tenant residential. If you maintain a facility standardized on Corbin Russwin cylinders, it's the nut to stock for cylinder swaps and rekeys.
13) Is a dummy rim cylinder an alternative to ordering the 129F84-8 nut?
They solve different problems. The BEST 12E Series dummy rim cylinder is a 1-5/32 inch diameter non-keyed cylinder used to fill or trim an opening where no key function is needed. The Corbin Russwin 129F84-8 is the threaded nut that holds a working mortise or rim cylinder in the lock body, so it is the part you order to restore an operating keyed cylinder rather than to blank one off.
How fast can I get the Corbin Russwin 129F84-8 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 129F84-8 come with a warranty?
Absolutely. The Corbin Russwin 129F84-8 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 129F84-8?
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 129F84-8 from ZenSupply?
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