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Schlage Commercial C603-950 Primus Cylinder Sidebar
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 C603-950 – Frequently Asked Questions
1) What is the Schlage C603-950 Primus cylinder sidebar and what does it do?
The C603-950 is the sidebar component for Schlage Primus cylinders. Primus keys carry a second cut track on the side of the blade in addition to the normal top cuts, and the sidebar is the part that reads that side track. Both the top pins and the sidebar have to align before the plug will turn, which is what gives Primus its key control and pick resistance. It is a service part for building or repairing a Primus cylinder, not a complete cylinder.
2) Is the C603-950 sidebar something a property manager should be ordering, or is it a locksmith part?
This is a locksmith bench part. Rebuilding Primus cylinders takes a plug follower, pinning kit, and access to your Primus key records, and Primus is a restricted system in most markets. If the goal is simply to get a door back in service or to match other Primus openings in the building, order a complete Primus cylinder keyed to your system rather than the sidebar.
3) Will the C603-950 work in mortise, rim, and key-in-lever Primus cylinders?
The sidebar is a plug and shell internal, so it is not tied to the cylinder's external format the way a cam or tailpiece is. What does have to match is that the cylinder is a Primus cylinder built for a sidebar. Mortise, rim, and key-in-knob or lever Primus cylinders differ in shell length and drive hardware, and those parts are ordered separately from this one.
4) How many sidebars do I need per Primus cylinder?
One. Each Primus cylinder uses a single sidebar, so the C603-950 is ordered per cylinder being built or repaired. Shops that rebuild Primus regularly stock them in quantity alongside pins and springs.
5) Is the C603-950 Primus sidebar available in any other model or variation?
It is sold as a single model, C603-950. There are no finish, size, or keyway options on it, since the sidebar is an internal part and carries no visible finish.
How fast can I get the Schlage C603-950 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 C603-950 come with a warranty?
Absolutely. The Schlage C603-950 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 C603-950?
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 C603-950 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.