Schlage B590-298 Plug Extensio...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$19.41
Schlage B590-298 Plug Extension for Modular Cylinder

Schlage B590-298 Plug Extension for Modular Cylinder

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Model: B590-298

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

$19.41
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Schlage B590-298 Plug Extension for Modular Cylinder

The Schlage B590-298 is a genuine OEM plug extension designed specifically for use with Schlage modular cylinders. Purpose-built as a commercial-grade replacement part, this component ensures continued proper function and fit within compatible Schlage modular cylinder assemblies. Sourced directly from Schlage, this plug extension maintains the precision tolerances and quality standards expected in professional door hardware applications.

Key Features

  • Genuine Schlage Component: Authentic Schlage replacement part engineered for precise fit and function within compatible modular cylinder assemblies.
  • Modular Cylinder Compatibility: Designed specifically for use with Schlage modular cylinders, ensuring reliable integration with existing hardware.
  • Commercial-Grade Quality: Built to the performance standards required for commercial door hardware applications and professional installations.
  • Drop-In Replacement: Engineered as a direct replacement part to restore original cylinder operation without modification.
  • Precision Manufacturing: Manufactured to exact specifications to maintain proper plug engagement and smooth cylinder operation.

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: B590-298
  • Features: Schlage Parts

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Schlage B590-298?

Schlage replacement parts like the B590-298 Plug Extension are manufactured to the same exacting standards as the original components, ensuring reliable performance in demanding commercial environments. Specifying genuine Schlage parts preserves the integrity of modular cylinder assemblies and supports long-term, trouble-free operation in professional door hardware installations.

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:
B590-298
Features:
Schlage Parts

Schlage B590-298 – Frequently Asked Questions

1) What is the Schlage B590-298 plug extension actually used for?
The B590-298 is a genuine Schlage plug extension that fits into Schlage modular cylinder assemblies. It is a replacement component, not a complete cylinder, so it goes into an existing modular cylinder to restore correct plug engagement and smooth key operation. If you need a whole keyed cylinder rather than an internal part, this is not the item to order.
2) I actually need a complete replacement cylinder, not an internal part. What should I be looking at instead?
If the whole cylinder is being replaced, a plug extension will not help you. For a mortise opening, a Grade 1 mortise cylinder such as the Corbin Russwin 1000 Series in 1-1/2 inch with an A02 straight cam, or the 1070 Series 6-pin housing in 1-1/4 inch with an A01 cloverleaf cam, covers most standard preps. For rim devices, the Corbin Russwin 3070 6-pin rim cylinder housing with a 1-7/8 inch tailpiece is the common choice. Match the cam or tailpiece to the lock you are working on.
3) What do I use on an aluminum storefront door where a Schlage modular cylinder part does not apply?
Storefront deadlocks take their own cylinder hardware. The Adams Rite 4036 is a five-pin mortise cylinder rated Grade 1 with a 1/2 inch minimum door thickness. For MS1847 deadlock and deadlatch systems, the Adams Rite 4024 is a cylinder pull with trim plate mounting and the Adams Rite 4025 is a five pin tumbler cylinder pull with through-screws; on wood doors the Adams Rite 4026 five pin tumbler cylinder pull is the one matched to the 5017 wood door deadlock and deadlatch. The Schlage B590-298 serves Schlage modular cylinder assemblies rather than any of these.
4) If I need a complete mortise cylinder rather than a plug extension, what should I order instead of the Schlage B590-298?
The B590-298 is a plug extension, a replacement component that goes inside a Schlage modular cylinder assembly, not a cylinder you can key and install on its own. If the job calls for a complete mortise cylinder, the Corbin Russwin CR1000-112 is a 1000 Grade 1 series mortise cylinder in 1-1/2 inch length with an A02 straight cam, and the Corbin Russwin CR1070-114-A01 is a 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam. The Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder cut to the Schlage C keyway, which is the closer match if the rest of the building is keyed to Schlage C.
5) Will a Corbin Russwin 1080 LFIC cylinder work in a Schlage mortise lock instead of rebuilding my modular cylinder with a B590-298?
Yes, for an L-series opening that is a legitimate alternative path. The Corbin Russwin CR1080-112-A01 is a 1-1/2 inch large format interchangeable core mortise cylinder, 6-pin, listed for Schlage L9000 mortise locks with an A01 Schlage L cam. That replaces the whole cylinder with an interchangeable core setup, whereas the Schlage B590-298 plug extension restores an existing Schlage modular cylinder assembly to original operation without changing the keying system you already run.
6) My opening is a key-in-knob or key-in-lever lock - is the Schlage B590-298 the right part?
No. The B590-298 is a plug extension for Schlage modular cylinders, so it only applies where a modular cylinder assembly is being serviced. For key-in-knob and key-in-lever work, the Kaba Ilco 1539 is a key-in-knob and lever universal cylinder and the Kaba Ilco 1599 is a key-in-knob replacement cylinder; the Kaba Ilco 1579 is the knob and lever cylinder built for Sargent locks. On Falcon RU/T series levers, the Falcon A23161-05 G is a key-in-lever cylinder with a 6-pin G keyway supplied keyed different with two cut keys.
7) Is the B590-298 a commercial part or is it for residential Schlage locks?
It is a commercial part. Schlage lists the B590-298 under its commercial line, and it goes into modular cylinder assemblies used in offices, schools, healthcare buildings, retail, warehouses, multi-tenant residential and government facilities. Residential-grade Schlage locks do not use the modular cylinder platform this piece is built for.
8) Does the B590-298 plug extension come keyed, or do I need to key it myself?
The B590-298 is an internal plug extension, not a keyed unit. Keying stays with the cylinder plug it installs into, so there is no keyway or key order to specify with this part. A locksmith working a keying schedule orders keyed cylinders separately and uses this piece only to complete the modular assembly.
9) Do I have to modify the cylinder to install the B590-298?
No modification. Schlage builds the B590-298 as a drop-in replacement to the original component tolerances, so it seats in a compatible Schlage modular cylinder assembly as-is and restores the original operation. Nothing needs to be filed, cut, or shimmed.
10) Is there a small-format interchangeable core option instead of repairing a Schlage modular cylinder?
Yes, if you would rather move the facility to interchangeable cores than service individual cylinders. BEST offers the 1C Series standard 5-pin core and the 1CB 150 Series interchangeable core, with the 1CDF drill-resistant patented 7-pin brass core in the 150 Series for higher-security openings. Corbin Russwin also makes an LFIC route: the 1080 Series 1-1/2 inch 6-pin large format core mortise cylinder is built for Schlage L9000 mortise locks with an A01 Schlage L cam.
11) I want to move a facility to interchangeable cores instead of stocking modular cylinder parts like the B590-298 - what are the options?
An interchangeable core program changes the service model: instead of rebuilding a cylinder, you pull and swap a core. The BEST 1CB is a 1CB series Peaks 150 series interchangeable core cylinder, the BEST 1CDF is a drill resistant patented interchangeable core with 7 pins in brass from the 150 series, and the BEST 1C5 is a standard 5-pin cylinder core. The Schlage B590-298 stays relevant where you are maintaining existing Schlage modular cylinder assemblies rather than converting the openings, since it is a commercial replacement part for those assemblies.
12) Is the Schlage B590-298 a tailpiece extension for a rim cylinder on an exit device?
No. The B590-298 is a plug extension used inside Schlage modular cylinder assemblies. For rim applications, the Corbin Russwin 3070-178 is a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece, and the BEST 12E series dummy rim cylinder has a 1-5/32 inch diameter for openings that need the appearance of a cylinder without keyed function. Those are complete rim cylinder parts, not a component of a modular Schlage cylinder.
13) I have residential handlesets and deadbolts to rekey - does the B590-298 apply, or is there a better part?
The B590-298 is designated for commercial use as a Schlage modular cylinder replacement part, so it is not the piece for handleset and deadbolt retrofits. The Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece. The Medeco 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and the Emtek handleset and deadbolt outside cylinder, and the Emtek CY4 cylinder is sold individually.
14) Are aftermarket plug extensions the same as the Schlage B590-298?
The B590-298 is sourced from Schlage as an OEM component, made to the same tolerances as the part it replaces. That matters on a plug extension, because the fit controls plug engagement and how the key turns. An off-spec piece can bind or leave the plug under-engaged in the assembly.
15) I manage a portfolio and want one part number on the shelf for Schlage modular cylinder repairs. Is B590-298 that part?
For the plug extension itself, yes, the model is B590-298 and it applies across compatible Schlage modular cylinder assemblies rather than being tied to one lock function. Stock it alongside your keyed cylinders and you can rebuild a modular cylinder in-house instead of pulling a full cylinder out of inventory each time.
How fast can I get the Schlage B590-298 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 B590-298 come with a warranty?
Absolutely. The Schlage B590-298 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 B590-298?
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
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