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Schlage C604-191 Slide Catch Spring for ND Series Levers and D40/44/53/73/85 Knobs
The Schlage C604-191 Slide Catch Spring is a genuine OEM replacement part engineered for use with Schlage ND Series levers and D40, D44, D53, D73, and D85 series knobs. Designed to restore reliable mechanical function to compatible Schlage locksets, this replacement spring ensures proper slide catch engagement and smooth operation across a wide range of commercial door hardware configurations. Sourced directly as a Schlage part, the C604-191 offers a precise fit for qualified service and maintenance applications.
Key Features
- Broad Compatibility: Designed for use with Schlage ND Series levers and D40, D44, D53, D73, and D85 series knobs, covering a wide range of commercial lockset configurations.
- Genuine Schlage Part: Authentic OEM component manufactured to Schlage specifications, ensuring precise fit and reliable performance in compatible hardware.
- Slide Catch Function: Restores proper slide catch spring tension and engagement, maintaining smooth and dependable lever or knob operation after wear or component failure.
- Commercial-Grade Quality: Rated for commercial applications, meeting the durability demands of high-traffic door hardware environments.
- Targeted Replacement: Classified as a replacement part in the Rings, Spindles, and Springs product type, making it easy to identify for maintenance and service purposes.
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: C604-191
- Features: Schlage 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 Schlage C604?
Schlage replacement parts like the C604-191 are manufactured to the same exacting standards as the original hardware, ensuring compatibility and reliable mechanical performance in demanding commercial environments. Choosing genuine Schlage components for maintenance and repair helps preserve the integrity and longevity of ND Series and D-Series door hardware installations.
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:
- C604-191
- Features:
- Schlage Parts
Schlage C604-191 – Frequently Asked Questions
1) Can a Corbin Russwin swivel spindle pin and set screw be used in place of the Schlage C604-191 slide catch spring?
No. The C604-191 is a slide catch spring, a Schlage OEM replacement part made for ND Series levers and D40, D44, D53, D73 and D85 knobs, and it restores spring tension to the slide catch. The Corbin Russwin swivel spindle pin x set screw is a spindle retention pin and screw for Corbin Russwin locksets, a different component performing a different job in a different manufacturer's chassis. Service a Schlage ND or D Series lockset with the Schlage part and keep the Corbin Russwin pin and screw for Corbin Russwin hardware.
2) What does the slide catch spring actually do in a Schlage ND lever?
It supplies the tension that keeps the slide catch engaged. When the spring weakens or breaks, the catch no longer holds and the lever or knob stops operating cleanly. Swapping in the C604-191 restores that spring tension without replacing the whole lockset.
3) Is the C604-191 a genuine Schlage part or an aftermarket spring?
Genuine Schlage OEM. It is manufactured to Schlage specification for ND Series and D Series hardware, which is what makes it a drop-in for the original spring rather than a close-enough substitute.
4) Does ordering the C604-191 get me the complete slide catch assembly?
No. The C604-191 is the spring only, catalogued by Schlage as a replacement part. If the slide catch itself, the spindle or the retaining ring is worn, those are separate parts and need to be ordered alongside it.
5) I need a spindle part for a Corbin Russwin lockset, not Schlage. Is the C604-191 an option?
No, the C604-191 only serves Schlage ND and D Series hardware. For Corbin Russwin, the Corbin Russwin Swivel Spindle Pin X Set Screw is the brand-correct part, listed for 1-3/4 inch doors. Lock internals are not cross-brand interchangeable.
6) Is this spring suitable for high traffic commercial openings or is it a residential-grade part?
It is a commercial-rated part, intended for ND Series and D Series hardware in office buildings, schools, healthcare, retail, industrial facilities, multi-tenant residential and government buildings. Property managers standardizing on Schlage ND across a portfolio can keep these on the shelf as a common wear item.
7) Is there more than one version of the C604-191 to choose from, like a finish or handing?
No options to specify. The C604-191 is a single part number with no finish, handing or size variants, so the order is just the quantity you need.
How fast can I get the Schlage C604-191 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 C604-191 come with a warranty?
Absolutely. The Schlage C604-191 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 C604-191?
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 C604-191 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.