Schlage K110-550 Retaining Rin...
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Schlage K110-550 Retaining Ring and Spacers Pack for L Series Knobs

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Model: K110-550

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

$26.31
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Schlage K110-550 Retaining Ring and Spacers Pack for L Series Knobs

The Schlage K110-550 is a genuine Schlage replacement parts pack that includes one (1) retaining ring and two (2) spacers, specifically designed for use with Schlage L Series knobs. This commercial-grade accessory kit ensures proper reassembly and secure component retention when servicing or replacing hardware on compatible L Series knob installations. As an authentic Schlage part, it provides the precise fit and dimensional accuracy required for reliable, long-term performance in commercial door hardware applications.

Key Features

  • Complete Component Pack: Includes one (1) retaining ring and two (2) spacers for a comprehensive replacement solution in a single kit.
  • L Series Compatibility: Engineered specifically for use with Schlage L Series knobs, ensuring precise fit and proper function within the existing hardware assembly.
  • Genuine Schlage Part: Authentic Schlage replacement component manufactured to original specifications for reliable performance and proper integration.
  • Commercial-Grade Construction: Designed to meet the demands of commercial door hardware applications where consistent, dependable operation is essential.
  • Precision Engineering: Dimensional accuracy ensures secure retention and correct spacing of knob components during reassembly or servicing.

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: Cylinders
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: K110-550
  • Features: Schlage Parts

Typical Applications

  • Commercial Office Buildings Requiring Hardware Maintenance
  • Educational Facilities Servicing Existing L Series Knob Hardware
  • Healthcare Institutions Maintaining Door Hardware Components
  • Retail Establishments Replacing Worn or Damaged Knob Parts
  • Government and Municipal Buildings With Schlage L Series Installations
  • Multi-Tenant Residential Properties With Commercial Hardware
  • Industrial and Warehouse Facilities Performing Preventive Maintenance

Why Schlage K110-550?

Schlage replacement parts are manufactured to the same exacting standards as original equipment, ensuring that repaired or serviced hardware performs as intended. The K110-550 pack delivers the precise retaining ring and spacer components needed to restore L Series knob assemblies to proper operating condition, making it the correct choice for facility managers, locksmiths, and commercial hardware professionals seeking authentic Schlage parts.

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:
Cylinders
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
K110-550
Features:
Schlage Parts

Schlage K110-550 – Frequently Asked Questions

1) What exactly comes in the Schlage K110-550 pack?
One retaining ring and two spacers, packaged as a single Schlage service pack for L Series knobs. It is a hardware-only kit, so no knob, spindle, cylinder or cylinder key parts are included. If a worn L Series knob assembly needs the ring and spacing components to go back together properly, this is the pack that supplies them.
2) Will the K110-550 retaining ring fit Schlage ND or AL series knobs?
No. The K110-550 ring and spacers are made for Schlage L Series knobs, which are the mortise-lock knob trims. ND and AL are cylindrical lock lines with different trim components, so this pack is not the right service part for them.
3) My L Series knob is loose and keeps working itself off. Is the retaining ring what I need?
That is the usual cause. The retaining ring is what holds the knob captive on the assembly, and the two spacers set the correct depth so the knob seats without play. If the knob itself, the spindle or the lock body is damaged, the K110-550 won't fix that, it only restores the retention and spacing components.
4) Does the K110-550 include a cylinder for the L Series lock?
No cylinder is in this pack, just the retaining ring and two spacers. For a Schlage L9000 mortise lock cylinder, an option ZenSupply carries is the Corbin Russwin 1080 Series 1-1/2 inch six-pin LFIC mortise cylinder with the A01 Schlage L cam, which is listed for Schlage L9000 mortise locks.
5) Will a replacement cylinder like the Kaba Ilco 1599 fix a loose Schlage L Series knob instead of the K110-550 parts pack?
No - those solve different problems. The Schlage K110-550 is a parts pack containing one retaining ring and two spacers that hold and correctly space the knob components during reassembly of Schlage L Series knobs; it contains no keyed hardware at all. The Kaba Ilco 1599 is a key-in-knob replacement cylinder, the keyed plug portion of a lock. If the knob is loose or will not stay retained on the spindle, the K110-550 hardware is what you need; if the key no longer turns or you are rekeying, a cylinder such as the 1599 is the correct part.
6) I need to rekey Schlage L9000 mortise locks, not repair the knob - what part covers that?
The Schlage K110-550 is a replacement retaining ring and spacer pack for L Series knobs and has no keying function. For keying an L9000 mortise lock, the Corbin Russwin 1080 Grade 1 Series mortise cylinder is offered in a 1-1/2 inch 6-pin large format interchangeable core configuration listed for Schlage L9000 mortise locks with the A01 cloverleaf cam. That covers the keyed side of the lock while the K110-550 covers mechanical retention of the knob assembly.
7) Is the K110-550 an original Schlage part or an aftermarket copy?
Genuine Schlage. The K110-550 is an authentic Schlage replacement part built to original specifications, which is what keeps the spacing and retention correct when an L Series knob is reassembled.
8) Is this part rated for commercial door traffic or is it residential grade?
Commercial. Schlage classes the K110-550 as a commercial-grade replacement part, which matches where L Series mortise hardware normally lives: offices, schools, healthcare, government buildings and multi-tenant properties under heavy use.
9) Is there an alternative to the K110-550 if the lever cylinder itself is worn rather than the knob retainer?
Yes. The Schlage K110-550 addresses knob retention and spacing on L Series knobs only. If the keyed cylinder in a knob or lever is the worn component, Kaba Ilco offers the 1539 Series key-in-knob and lever universal cylinder, and the 1579 Series knob and lever cylinder configured for Sargent locks. Falcon also lists the A23161-05 G key-in-lever cylinder with a 6-pin G keyway, keyed different, supplied with two cut keys. Choose based on the lock brand the cylinder is going into.
10) Can the K110-550 be used on an aluminum storefront deadlock?
No. The Schlage K110-550 is a commercial replacement parts pack of one retaining ring and two spacers built for Schlage L Series knobs, so it has no application in a narrow stile storefront deadlock. For that opening, Adams Rite lists the 4024 cylinder pull with trim plate mounting and the 4025 five pin tumbler cylinder pull with through-screws, both designed for use with the Adams Rite MS1847 deadlock/deadlatch, plus the 4036 Grade 1 mortise cylinder for doors 1/2 inch minimum thickness.
11) We standardize on interchangeable core - does the K110-550 work with an IC system?
The Schlage K110-550 is purely mechanical retention hardware - one retaining ring and two spacers for L Series knobs - so it is independent of whatever keying system the opening uses and does not accept a core. For the keyed side of an interchangeable core program, BEST lists the 1C Series standard 5-pin cylinder core, the Peaks 1CB 150 Series interchangeable core cylinder, and the 1CDF drill resistant patented interchangeable core in 7-pin brass, 150 Series.
12) Should I stock the K110-550 for an in-house maintenance program?
It makes sense if your facility runs Schlage L Series knob hardware. It is a consumable-style service kit: the ring and spacers are the small parts that get lost or deformed during a knob teardown, and having them on the shelf keeps a door from sitting out of service. Buyers standardizing on L Series across a building typically keep several packs on hand.
13) What should I order instead of the K110-550 for a rim exit device cylinder?
The Schlage K110-550 retaining ring and spacer pack serves L Series knobs and does not fit rim device prep. For a rim application, Corbin Russwin offers the 3070 6-pin rim cylinder housing with a 1-7/8 inch tailpiece, and BEST offers the 12E Series dummy rim cylinder with a 1-5/32 inch diameter where a non-keyed rim appearance is wanted.
14) Is the K110-550 a residential handleset repair part?
No. The Schlage K110-550 is designated for commercial use and is intended for Schlage L Series knobs in commercial door hardware. For residential handlesets and deadbolts, Medeco lists the 1075127 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1012040 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the 1065140 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders.
How fast can I get the Schlage K110-550 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 K110-550 come with a warranty?
Absolutely. The Schlage K110-550 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 K110-550?
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 K110-550 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.
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