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Schlage Commercial C603-623 Dust Box for T-Strike
The Schlage C603-623 is a replacement dust box for T-strike applications. It covers the strike pocket, keeping it clear of debris and protecting the latch mechanism for consistent operation over the life of the door assembly. Finished in 623 (Satin Bronze) to coordinate with matching Schlage hardware.
Compatibility
- Compatible with Schlage B100, B250, B400, E, B, F100, H, MD, and S200 Series locksets
- Designed for 0.685" double cylinder applications
- For use with T-strike configurations
Product Details
- Part Number: C603-623
- Finish: 623 - Satin Bronze
- Brand: Schlage Commercial
- Warranty: Limited Lifetime Mechanical/Finish
Ordering Notes
This is a replacement/accessory part. Verify your existing lockset series and strike configuration before ordering. Contact us if you need help confirming compatibility with your specific installation.
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 C603-623 – Frequently Asked Questions
1) What does the dust box on a Schlage T-strike actually do, and do I need one?
A dust box is the cup that sits behind the strike plate, inside the mortised pocket in the frame. The Schlage C603 keeps that pocket clean and free of debris so the latch bolt drops fully and the lock keeps working smoothly over the life of the door. If your existing frame prep has a crushed, rusted, or missing box behind the T-strike, this is the replacement part for it. It is an accessory only, so it does not include the strike plate or the lockset.
2) Will the Schlage C603 dust box work with my B-series deadbolt?
It fits Schlage B100, B250, B400, E, B, F100, H, MD, and S200 Series locksets. That covers most of the commercial and residential-grade B-series deadbolts and F100 knob and lever sets, so if your hardware is in that list and the frame is prepped for a T-strike, the C603 is the matching box.
3) What size is the Schlage C603 dust box?
The C603 is built for 0.685 inch double cylinder applications with a T-strike. That is the dimension to check against your existing frame prep, because a dust box has to drop into the pocket already routed behind the strike. If your opening was prepped for a different strike style, this box will not seat.
4) I'm restocking a truck for lock service calls, how do I order the Schlage dust box in the right finish?
Order by the full part number, C603-623. The C603 is the base part and the 623 suffix is the finish code, so C603-623 is the finish 623 version. Since the dust box is concealed inside the frame pocket once the strike plate is screwed over it, the finish matters far less here than it does on the visible strike, but matching the code keeps your parts consistent with the rest of the Schlage hardware on the job.
5) Is the Schlage C603 a genuine Schlage part or an aftermarket dust box?
It is the Schlage Commercial replacement dust box, part number C603-623, sold for T-strike applications on Schlage locksets. Buying the manufacturer's own box matters on a frame prep that was cut to Schlage's template, since an approximate aftermarket cup can bind the latch or refuse to seat in the pocket.
How fast can I get the Schlage C603-623 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 C603-623 come with a warranty?
Absolutely. The Schlage C603-623 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 C603-623?
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 C603-623 from ZenSupply?
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and
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every order.
Our team is always ready to help you choose the right product for your project.