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Schlage Commercial C603-524 D Series Knobs Cylinder Tailpiece
Manufacturer Resources
Product Specs
- Warranty:
- Limited Lifetime Mechanical/Finish
- Product Group:
- Mechanical Locks
- Subcategory:
- Parts and Accessories
- Product Subgroup:
- Parts and Accessories
- Product Category:
- Mechanical Locks
- Department:
- Door Hardware
Schlage C603-524 – Frequently Asked Questions
1) What is the Schlage C603-524 tailpiece used for on a D Series knob lock?
It is the cylinder tailpiece for Schlage D Series commercial knob locks. The tailpiece is the flat bar that runs off the back of the key cylinder and transfers the key turn into the lock chassis to retract the latch. It is a replacement part, not a complete cylinder or lockset, so you order it when the tailpiece itself is bent, worn, or missing after a cylinder swap.
2) Will this Schlage tailpiece work on an ND Series or L Series mortise lock?
No. The C603-524 is specified for Schlage D Series cylindrical knob locks. ND Series levers and L Series mortise locks use their own cylinder and tailpiece arrangements, and a D Series tailpiece is the wrong length and engagement for them. Confirm the lock you are servicing is a D Series knob before ordering.
3) Is the Schlage C603-524 a complete key cylinder or just the tailpiece?
Just the tailpiece. The C603-524 is the drive bar alone, sold as a Schlage D Series repair part. If the plug or the whole cylinder is the problem, you need a D Series knob cylinder instead, and you would then key it to your existing system separately.
4) How do I order the Schlage D Series knob cylinder tailpiece, and is there more than one version?
The part is ordered as Schlage Commercial C603-524, and it is supplied under model C603-098. That is the only configuration, so there is no finish, handing, or length choice to make on this one. Tailpieces are a steel functional part behind the cylinder, so finish does not come into it.
5) I manage a building with Schlage D Series knobs on every door. Can I stock this one tailpiece for all of them?
For D Series knob locks, yes. This is a single-configuration part for that family, so one item covers the D Series knob openings in your building rather than needing a different tailpiece per door. If any of your openings are lever locks or mortise locks, those are a different family and need their own parts.
How fast can I get the Schlage C603-524 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 C603-524 come with a warranty?
Absolutely. The Schlage C603-524 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 C603-524?
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 C603-524 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.