Schlage L283-055 Cylinder Reta...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$36.24
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Schlage L283-055 Cylinder Retainer Plate and Screw for L Series Mortise Locks

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Model: L283-055

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

$36.24
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Schlage L283-055 Cylinder Retainer Plate and Screw for L Series Mortise Locks

The Schlage L283-055 is a genuine OEM replacement Cylinder Retainer Plate and Screw designed specifically for use with the Schlage L Series mortise lock line manufactured after April 1994. This commercial-grade replacement part ensures proper cylinder retention and secure mechanical alignment within compatible L Series locksets. Ideal for facilities maintenance professionals and locksmiths performing service, repair, or component replacement on Schlage L Series hardware.

Key Features

  • Genuine Schlage OEM Component: Manufactured to original factory specifications, ensuring precise fit and reliable performance within compatible L Series mortise locks.
  • Specific Compatibility: Designed exclusively for Schlage L Series mortise locks produced after April 1994, providing a verified, drop-in replacement solution.
  • Complete Replacement Kit: Includes both the cylinder retainer plate and the required mounting screw, supplying everything needed for a proper cylinder retention repair or replacement.
  • Commercial-Grade Construction: Built to the standards of Schlage's L Series commercial mortise lock line, ensuring durability and long service life in high-demand environments.
  • Maintains Cylinder Security: Properly retains the mortise cylinder within the lockset body, preserving the mechanical integrity and security function of the lock assembly.
  • Simplified Maintenance: Enables efficient field service and repair of existing L Series installations without requiring full lockset replacement, minimizing downtime and cost.

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: L283-055
  • Features: Schlage Parts

Typical Applications

  • Commercial Office Buildings with Schlage L Series Mortise Lock Installations
  • Educational Facilities Performing Scheduled Lock Maintenance
  • Healthcare Institutions Servicing Existing Door Hardware
  • Government and Municipal Buildings with L Series Hardware
  • Hospitality Properties Maintaining Commercial Mortise Locksets
  • Industrial and Warehouse Facilities with Schlage L Series Locks
  • Locksmith and Facilities Management Service Operations

Why Schlage L283-055?

Schlage L Series replacement parts are engineered to the same exacting standards as the original hardware, delivering verified compatibility and dependable performance for commercial mortise lock maintenance. Choosing genuine Schlage OEM components like the L283-055 ensures proper fit, preserves the mechanical integrity of the lock assembly, and supports the long-term reliability that L Series locksets are known for in demanding commercial environments.

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:
L283-055
Features:
Schlage Parts

Schlage L283-055 – Frequently Asked Questions

1) What exactly is the Schlage L283-055 part, and is the screw included?
The L283-055 is the cylinder retainer plate for Schlage L Series mortise locks, and it ships with the mounting screw it needs. It is the plate that holds the mortise cylinder in place inside the lock case, not the cylinder itself. If you need the keyed cylinder, that is a separate order.
2) My mortise cylinder keeps turning loose in the lock body. Is the retainer plate what I need?
That is the symptom this part addresses. The retainer plate is what clamps the mortise cylinder in the case and keeps it from backing out or rotating; when the plate or its screw is missing or damaged the cylinder no longer holds position. Replacing the plate and screw restores cylinder retention without swapping the whole lockset.
3) I need the cylinder itself for a Schlage L Series mortise lock, not just the retaining hardware - what should I order?
The Schlage L283-055 is a cylinder retainer plate and screw, the part that holds a mortise cylinder in place inside the lock body; it contains no pins, keyway, or cam. If you need the actual keyed cylinder for a Schlage L9000 mortise lock, the Corbin Russwin CR1080-112-A01 is a 1-1/2 inch six-pin large format interchangeable core mortise cylinder built for Schlage L9000 mortise locks with an A01 Schlage L cam. The Detex MC65 is another mortise cylinder option, a 1-1/8 inch six-pin commercial cylinder cut to the Schlage C keyway. Many service calls need both: the cylinder and the retainer plate that secures it.
4) Is the Schlage L283-055 usable on an Adams Rite storefront deadlock?
No. The L283-055 retainer plate and screw is made to original Schlage factory specifications for Schlage L Series mortise locks produced after April 1994, and it is not a storefront part. For an Adams Rite MS1847 deadlock the matching cylinder hardware is the Adams Rite 4024 cylinder pull with trim plate mounting or the 4025 five-pin tumbler cylinder pull with through-screws. For a wood door using the Adams Rite 5017 deadlock or deadlatch, the 4026 five-pin tumbler cylinder pull is the one built for that lock.
5) Is the Schlage L283-055 a genuine OEM part or an aftermarket copy?
Genuine Schlage OEM, made to factory spec for the L Series commercial mortise line. That matters on a retainer plate because the screw hole location and plate profile have to match the lock case pocket exactly.
6) Do I have to replace the whole mortise lockset if the cylinder retainer is damaged?
No. The retainer plate and screw are field-serviceable on L Series locks, so a maintenance tech can restore cylinder retention on the existing lock body instead of buying a new lockset and re-prepping nothing. That is the point of stocking the L283-055 on a facility parts shelf.
7) Does the L283-055 work on a Schlage L Series lock made before 1994?
The L283-055 is described as the drop-in replacement for Schlage L Series mortise locks manufactured after April 1994, so verify the lock case date before ordering it for older hardware. If you are replacing a dated mortise lock outright rather than servicing it, the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder in the 4036 Series with a 1/2 inch minimum door thickness, and the Corbin Russwin CR1000-112 is a 1000 Series Grade 1 mortise cylinder at 1-1/2 inch with an A02 straight cam.
8) We are rekeying a building to interchangeable cores - is the L283-055 part of that changeover?
The L283-055 is a mechanical retainer plate and screw, a commercial replacement part with no keying of its own, so it plays no role in a keying decision beyond holding the cylinder in the lock case. For the keying side, BEST interchangeable core products cover that: the 1C5 is a standard five-pin cylinder core, the 1CB is a Peaks 150 Series interchangeable core cylinder, and the 1CDF is a drill resistant patented seven-pin brass 150 Series interchangeable core. If your L Series locks are being serviced during the changeover, the retainer plate and screw are the hardware you replace if the originals are worn or missing.
9) The lock is a key-in-lever, not a mortise lock - does the L283-055 apply?
No. The L283-055 retains a mortise cylinder inside a Schlage L Series mortise lock body; key-in-lever and key-in-knob locks use a different cylinder arrangement entirely. For those, the Falcon A23161-05 G is a key-in-lever cylinder for RU/T Series with a six-pin G keyway supplied keyed different with two cut keys, and the Kaba Ilco 1539 is a universal key-in-knob and lever cylinder. The Kaba Ilco 1599 is a key-in-knob replacement cylinder, and the 1579 is a knob and lever cylinder for Sargent.
10) Is this a residential or commercial-duty part?
Commercial. The L283-055 belongs to Schlage's L Series commercial mortise lock program, the hardware used on office, school, healthcare, and government openings. It is not a residential lock component.
11) Is the L283-055 a cylinder pull or trim plate like the Adams Rite 4024?
No, and they are not interchangeable. The L283-055 is an internal retainer plate inside a Schlage L Series mortise case. The Adams Rite 4024 is a cylinder pull with trim plate mounting for MS1847 deadlock systems, an exposed piece of door trim on aluminum stile doors. Different product, different lock family.
12) What is the difference between the L283-055 and a rim cylinder - could I use one in place of the other?
They are not interchangeable and serve different purposes. The L283-055 is the retainer plate and screw that secures a mortise cylinder inside a Schlage L Series lock case. A rim cylinder mounts through the door and drives a surface-mounted device with a tailpiece: the Corbin Russwin 3070-178 is a six-pin rim cylinder housing with a 1-7/8 inch tailpiece, the Medeco 1012040 is a six-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1065244 is a five-pin lazy motion rim type cylinder with an Emtek tailpiece. None of those use a mortise cylinder retainer plate.
How fast can I get the Schlage L283-055 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 L283-055 come with a warranty?
Absolutely. The Schlage L283-055 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 L283-055?
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 L283-055 from ZenSupply?
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