Schlage N523-221 Inside Spring...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$75.00
$53.51

Schlage N523-221 Inside Spring Cage, Standard

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Model: N523-221

In Stock (leaves warehouse same day if ordered before 3pm ET)

$75.00
$53.51
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Schlage N523-221 Inside Spring Cage, Standard

  • ND Series
  • Certified Schlage Parts
  • Made With Strong Materials
  • Many Parts Are Finish Specific

Manufacturer Resources

Product Specs

Product Group:
Mechanical Locks
Product Subgroup:
Parts and Accessories
Product Type:
Rings, Spindles and Springs
Subcategory:
Parts and Accessories
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Category:
Mechanical Locks
Department:
Door Hardware

Schlage N523-221 – Frequently Asked Questions

1) What is the Schlage N523-221 inside spring cage used for?
The N523-221 is a replacement inside spring cage for Schlage ND Series locks. The spring cage is the internal part that returns the lever to horizontal after it is pushed down, so it is what you order when a lever on an ND Series lock has started to droop or feels dead on the return rather than the whole lock being worn out. It is a genuine Schlage part, not an aftermarket rebuild kit.
2) My ND Series lever is sagging. Do I replace the whole lock or just the spring cage?
A sagging lever with a lock that still latches and keys normally is usually the spring cage, and the N523-221 is the standard-duty inside cage for the ND Series. Replacing the cage keeps the existing chassis, cylinder, and keying in the door, which matters if the opening is keyed into a master system you do not want to disturb. If the latch itself is not retracting or the cylinder is worn, that is a different part.
3) Do I need to match the finish when ordering a Schlage N523-221 spring cage?
Many Schlage ND parts are finish specific, so the finish on your existing lever and rose matters when you are building an order. The spring cage itself is an internal component that sits behind the rose, but if you are replacing surrounding trim at the same time, order those pieces to the finish code on your door rather than assuming one part number covers all of them.
4) How many Schlage N523-221 spring cages do I need to fix one door?
One N523-221 covers the inside lever only. A door where both levers droop needs the matching outside cage as well, so count openings by which side is failing rather than ordering one part per door. Property managers standardizing a floor of ND Series locks generally find the corridor side wears first.
How fast can I get the Schlage N523-221 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 N523-221 come with a warranty?
Absolutely. The Schlage N523-221 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 N523-221?
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 N523-221 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.