Adams Rite 26-0366-03 Spindle ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
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Adams Rite 26-0366-03 Spindle Assembly Replacement Part for 4591 Lockset, 2-1/4" to 2-1/2" Door Thickness

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Model: 26-0366-03

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

$25.34
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Adams Rite 26-0366-03 Spindle Assembly Replacement Part for 4591 Lockset, 2-1/4" to 2-1/2" Door Thickness

The Adams Rite 26-0366-03 Spindle Assembly is a genuine OEM replacement component engineered specifically for the Adams Rite 4591 lockset series. Designed to accommodate doors with a thickness range of 2-1/4" to 2-1/2", this mounting assembly ensures precise fit and reliable mechanical operation in commercial door hardware applications. Built to Adams Rite's commercial-grade standards, this replacement part restores full lockset functionality when the original spindle component requires service or replacement.

Key Features

  • Door Thickness Compatibility: Engineered for doors measuring 2-1/4" to 2-1/2" thick, ensuring a precise mechanical fit for the intended application.
  • OEM Replacement Part: Genuine Adams Rite component designed as a direct replacement for the 4591 lockset series, maintaining original performance specifications.
  • Dedicated Lockset Compatibility: Specifically designed for use with the Adams Rite 4591 lockset, eliminating guesswork during sourcing and installation.
  • Commercial-Grade Construction: Manufactured to Adams Rite's commercial hardware standards for dependable performance in demanding environments.
  • Mounting Assembly Design: Functions as a precision mounting assembly, providing the mechanical linkage necessary for proper lockset lever and cylinder operation.
  • Direct-Fit Replacement: Engineered to integrate seamlessly with existing 4591 hardware, minimizing downtime during service or repair.

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: Mounting Assembly
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 26-0366-03
  • Features: Adams Rite Parts

Typical Applications

  • Commercial Office Buildings
  • Retail Storefronts with Aluminum Storefront Door Systems
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Multi-Tenant Commercial Properties
  • Industrial and Warehouse Facilities

Why Adams Rite 26-0366-03?

Adams Rite is a trusted name in commercial door hardware, and the 26-0366-03 Spindle Assembly reflects that commitment to precision engineering. Designed specifically for the 4591 lockset series and calibrated for 2-1/4" to 2-1/2" door thicknesses, this genuine replacement part ensures restored performance that meets original commercial-grade specifications. Facility managers and hardware professionals can rely on this component to deliver consistent, long-term mechanical integrity in high-use 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:
Mounting Assembly
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
26-0366-03
Features:
Adams Rite Parts

Adams Rite 26-0366-03 – Frequently Asked Questions

1) Will the Adams Rite 26-0366-03 spindle assembly work on my door thickness?
The 26-0366-03 spindle assembly is sized for doors measuring 2-1/4 to 2-1/2 inches thick. Spindle length is what sets these parts apart, so a thinner door (the usual 1-3/4 inch aluminum storefront leaf) needs the shorter spindle for that range instead. Measure the leaf at the lock stile before ordering.
2) What lockset does the Adams Rite 26-0366-03 spindle fit?
It is built for the Adams Rite 4591 lockset series and nothing else. This is the genuine Adams Rite part, not a generic spindle, so it drops into existing 4591 hardware without modification.
3) What does the spindle assembly actually do in a 4591 lockset?
It is the mechanical linkage that carries motion from the lever and cylinder through the door to the lock body. If the levers turn loose, feel sloppy, or no longer retract the latch, a worn or wrong-length spindle is the usual cause, and the 26-0366-03 replaces it rather than forcing you to buy a whole new lockset.
4) Do I get levers or a cylinder with the 26-0366-03?
No. This is the spindle assembly only, a service part for the 4591. Trim, levers, and cylinders are ordered separately if those are also being replaced.
5) I'm standardizing service parts across a building with Adams Rite 4591 locks. Is one spindle part number enough?
Not necessarily. Adams Rite breaks the 4591 spindle out by door thickness, and the 26-0366-03 covers 2-1/4 to 2-1/2 inch doors only. If your openings vary in leaf thickness, stock the spindle matching each thickness group rather than assuming one part covers the fleet.
6) Is this a commercial-duty part or a residential one?
Commercial. The 26-0366-03 is an Adams Rite commercial door hardware component, the kind used on aluminum storefront and multi-tenant openings in offices, schools, healthcare, and government buildings.
How fast can I get the Adams Rite 26-0366-03 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 26-0366-03 come with a warranty?
Absolutely. The Adams Rite 26-0366-03 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 26-0366-03?
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 26-0366-03 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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