Schlage C603-964 FSIC Core Act...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.55
Schlage C603-964 FSIC Core Actuating Pin Control Top Pin Replacement Part

Schlage C603-964 FSIC Core Actuating Pin Control Top Pin Replacement Part

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Model: C603-964

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

$16.55
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Schlage C603-964 FSIC Core Actuating Pin Control Top Pin Replacement Part

The Schlage C603-964 is a genuine FSIC (Full Size Interchangeable Core) Core Actuating Pin, also known as a Control Top Pin, designed as a precision replacement component for Schlage FSIC lock systems. This commercial-grade rekey part ensures proper core actuation and control function within compatible Schlage interchangeable core cylinders, maintaining the integrity and security of the locking system. Engineered to Schlage's exacting standards, this actuating pin is an essential component for locksmiths and facility managers servicing or rekeying FSIC lock installations.

Key Features

  • Genuine Schlage Component: OEM replacement part manufactured to Schlage's precise tolerances for reliable fit and function within FSIC core systems.
  • FSIC Compatibility: Specifically designed for Full Size Interchangeable Core (FSIC) cylinders, ensuring seamless integration with compatible Schlage lock platforms.
  • Control Top Pin Function: Serves as the core actuating pin that enables proper control key operation and core removal in FSIC interchangeable core systems.
  • Commercial-Grade Quality: Engineered for demanding commercial applications where consistent, dependable performance is required across high-use facilities.
  • Rekey and Servicing Application: An essential rekey part for locksmiths and security professionals maintaining or reconfiguring Schlage FSIC locking systems.
  • Direct Replacement: Serves as a drop-in replacement for worn or damaged actuating pins, restoring full operational integrity to existing FSIC 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: Rekey Parts
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: C603-964
  • Features: Schlage Parts

Typical Applications

  • Commercial Office Buildings with FSIC Master Key Systems
  • Educational Facilities Using Interchangeable Core Lock Systems
  • Healthcare Institutions Requiring Controlled Access Rekeying
  • Government and Municipal Buildings with FSIC Cylinder Installations
  • Industrial and Warehouse Facilities Servicing Schlage FSIC Hardware
  • Multi-Tenant Commercial Properties Undergoing Lock Reconfiguration
  • Locksmith and Security Professional Service Applications

Why Schlage C603-964?

Schlage is a trusted name in commercial door hardware, and the C603-964 Control Top Pin reflects the same commitment to precision and reliability found across the Schlage product line. As a genuine OEM replacement part, it ensures proper fit and function within FSIC interchangeable core systems, making it the correct choice for professionals who demand consistent performance during rekeying and lock servicing operations.

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:
Rekey Parts
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
C603-964
Features:
Schlage Parts

Schlage C603-964 – Frequently Asked Questions

1) Will the Schlage C603-964 control pin work in a small format interchangeable core (SFIC)?
No. The C603-964 is built for Schlage Full Size Interchangeable Core (FSIC) cylinders, and FSIC and SFIC are two different core formats with different pin stacks and different control shear line geometry. If the core you are servicing is a small format figure-eight core, this pin is the wrong part. Order it only when the core is a Schlage full size interchangeable core.
2) My control key turns but the FSIC core will not pull out of the housing. Is the control pin the part I need?
That is exactly what the C603-964 addresses. The core actuating pin is what lets the control key lift the stack to the control shear line so the core lug retracts and the core comes out of the housing. When that pin is worn, deformed, or missing, the control key rotates without releasing the core. Replacing it restores control function on a Schlage FSIC core. If the core still will not release with a sound pin, the problem is elsewhere in the cylinder, not in this component.
3) Is a Schlage control top pin the same thing as a regular top pin or driver pin in a rekey kit?
No, and swapping one for the other is a common way to kill control function. A standard top pin only serves the operating shear line at the plug. The C603-964 is the control actuating pin, the piece that works the second, control shear line unique to interchangeable core cylinders. A generic driver pin out of a pinning kit will not reproduce that. Keep it separate from your standard top pin stock when you are pinning FSIC cores.
4) Is the C603-964 a genuine Schlage part or an aftermarket copy?
Genuine Schlage OEM. That matters more on a control pin than on most rekey components, because control function depends on the pin height and tolerance matching the rest of the Schlage FSIC stack. An off-spec substitute can bind the core or let it release when it should not.
5) Do I need to replace the control pin every time I rekey a Schlage FSIC core?
No. Routine rekeying changes the bottom pins and the operating stack; the actuating pin normally stays in the core. The C603-964 is stocked as a replacement for a pin that is worn, damaged, or lost during service, which is when a control key stops pulling cores reliably. Facilities running large FSIC master key systems usually keep a few on the shelf rather than ordering one per rekey.
6) Will this Schlage pin fit a residential Schlage deadbolt or knob from a home center?
It will not. The C603-964 is a commercial part tied to interchangeable core cylinders, and residential Schlage locksets use fixed cylinders with no control shear line and no removable core. If the cylinder does not come out with a control key, there is nothing in it for this pin to do.
7) I manage a building with Schlage interchangeable cores. What do I hand my locksmith when cores stop coming out with the control key?
Ask for the Schlage C603-964 core actuating pin, sometimes called the control top pin. It is the small component inside a full size interchangeable core that the control key acts on to release the core from the housing. Buying it by model number avoids the guesswork of a locksmith improvising from a generic pin kit, and it is the same part across the Schlage FSIC cores in a building running one keying system.
How fast can I get the Schlage C603-964 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 Schlage C603-964 come with a warranty?
Absolutely. The Schlage C603-964 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 Schlage C603-964?
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 Schlage C603-964 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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