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Schlage C603-956 Actuating Ring for FSIC Cylinders
The Schlage C603-956 is a commercial-grade actuating ring designed for use with Full Size Interchangeable Core (FSIC) cylinder systems. As a genuine Schlage replacement part, this actuating ring is engineered to maintain the reliable mechanical performance expected in professional door hardware applications. Classified under Rings, Spindles and Springs, the C603-956 is an essential component for servicing and maintaining Schlage mechanical lock assemblies in commercial environments.
Key Features
- FSIC Compatibility: Specifically designed for use with Full Size Interchangeable Core (FSIC) cylinder systems, ensuring precise fit and reliable operation.
- Genuine Schlage Part: Manufactured as an authentic Schlage replacement component, maintaining original performance standards and compatibility.
- Commercial-Grade Construction: Engineered for demanding commercial applications where consistent, long-term mechanical reliability is essential.
- Replacement Part Application: Designed to restore proper actuating function to Schlage mechanical lock assemblies during service or repair.
- Rings, Spindles and Springs Category: Categorized as a precision mechanical component within Schlage's Parts and Accessories line for targeted lock system maintenance.
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: Rings, Spindles and Springs
- Parts and Accessories Type: Replacement Parts
- Commercial/Residential: Commercial
- Product Model: C603-956
- Features: Schlage Parts
Typical Applications
- Commercial Office Buildings
- Educational Facilities
- Healthcare Institutions
- Government and Municipal Buildings
- Multi-Tenant Residential Properties
- Industrial and Warehouse Facilities
- Retail Establishments
Why Schlage C603-956?
Schlage Parts and Accessories are designed to integrate seamlessly with existing Schlage mechanical lock systems, preserving the original engineering integrity of the installation. The C603-956 actuating ring delivers the precise fit and mechanical consistency required for professional-grade FSIC cylinder maintenance in high-demand commercial environments. When reliability and compatibility matter, genuine Schlage replacement parts are the professional's choice for maintaining peak lock system performance.
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:
- Rings, Spindles and Springs
- Parts and Accessories Type:
- Replacement Parts
- Commercial/Residential:
- Commercial
- Product Model:
- C603-956
- Features:
- Schlage Parts
Schlage C603-956 – Frequently Asked Questions
1) What does the Schlage C603-956 actuating ring actually do in an FSIC lock?
The C603-956 is the actuating ring used with Schlage Full Size Interchangeable Core (FSIC) cylinders. It sits in the cylinder assembly and transfers the core's turning motion into the lock mechanism, so when it is worn or missing the key turns but the lock doesn't retract. It's sold as a genuine Schlage replacement part for service and repair of mechanical lock assemblies, not as a complete cylinder.
2) Will the C603-956 ring work with a small format interchangeable core?
No. This Schlage ring is built for Full Size Interchangeable Core cylinders. SFIC cores use a different core body and figure-8 profile, so an FSIC actuating ring will not seat or drive an SFIC housing. If your cores pull with a control key and are the small figure-8 type, you need SFIC service parts instead.
3) Can a Corbin Russwin swivel spindle pin and set screw be used in place of the Schlage C603-956 actuating ring?
No. The Schlage C603-956 is an actuating ring made for Full Size Interchangeable Core (FSIC) cylinder systems, where it transfers cylinder rotation within a Schlage mechanical lock assembly. The Corbin Russwin Swivel Spindle Pin X Set Screw is a spindle pin with a set screw, a different part in a different mount, rated by Corbin Russwin for a 1-3/4 inch door thickness. They occupy different positions in the lock and are not interchangeable; a Schlage FSIC prep calls for the C603-956.
4) I am rekeying a building and a few cylinders won't retract the latch. Do I replace the whole cylinder or just the actuating ring?
If the core turns freely with the key but the cam or tailpiece isn't driving the lock, the actuating ring is the usual failure point and the C603-956 replaces it without buying new cylinders or re-pinning cores. That keeps your existing keying intact across the building. If the core itself is binding or the key won't turn, the problem is in the core, not the ring.
5) Does the C603-956 come with a core, springs, or a spindle?
It's the actuating ring on its own, ordered as the single part number C603-956. No core, no key, no cylinder housing. Order the core, tailpiece or spindle separately if the teardown shows more than the ring is worn.
6) I am servicing a 1-3/4 inch door with a Corbin Russwin lock - do I need the Schlage C603-956?
Not for a Corbin Russwin lock. The C603-956 is a genuine Schlage replacement part built to integrate with Schlage mechanical lock assemblies using FSIC cylinders. For a Corbin Russwin lock on a 1-3/4 inch door, the Corbin Russwin Swivel Spindle Pin X Set Screw is the brand-matched component, listed for that door thickness. Match the replacement part to the lock manufacturer rather than to the door.
7) Is the Schlage C603-956 a commercial part or is it for residential locks?
Commercial. The C603-956 is catalogued by Schlage as a commercial-grade part for FSIC cylinder systems, the interchangeable-core setups used in offices, schools, healthcare, government buildings and multi-tenant residential, not for residential-grade keyed knobs and deadbolts.
How fast can I get the Schlage C603-956 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 C603-956 come with a warranty?
Absolutely. The Schlage C603-956 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 C603-956?
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 C603-956 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
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Our team is always ready to help you choose the right product for your project.