Schlage Commercial 20-079 FSIC...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$105.00
$56.96

Schlage Commercial 20-079 FSIC Rim Housing, Convertible Tailpiece Cam

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Model: 20-079 626
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$105.00
$56.96
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Schlage Commercial 20-079 FSIC Rim Housing with Convertible Tailpiece Cam

The Schlage 20-079 is a Full Size Interchangeable Core (FSIC) rim housing with a convertible tailpiece cam, designed for use with the Schlage modular cylinder system. The stainless steel housing allows a single modular cylinder body to be converted between rim, mortise, and key-in-lever or key-in-knob applications by swapping the front housing, rear housing, or cam. Available in 11 finishes to match existing hardware.

Modular Cylinder System Features

  • One cylinder body converts to three cylinder types by changing the tailpiece, cam, or rear housing
  • Accommodates thicker doors with six available rear housing lengths
  • Front housing available in all finishes to match installed locks
  • Supports interchangeability between Everest 29, Primus XP, and Classic key systems
  • Reduces parts inventory: assemble the required cylinder type on-site from modular components
  • Non-handed

Applications

  • Adaptable to rim, mortise, and key-in-lever or key-in-knob applications
  • Compatible with all Schlage keyways, including Everest 29 and Primus XP
  • Commercial use

Specifications

  • Model: 20-079
  • Cam Type: Convertible Tailpiece
  • Material: Stainless Steel
  • Warranty: 3 Year

Downloads

Schlage Key Systems, Cylinders and Keys Catalog

Manufacturer Resources

Product Specs

Subcategory:
Parts and Accessories
Cam Type:
Convertible Tailpiece
Warranty:
3 Year
Product Group:
Parts and Accessories
Product Subgroup:
Cylinders
Product Type:
Cylinders
Commercial/Residential:
Commercial
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Model:
20-079
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Product Substrate:
Stainless Steel
Department:
Door Hardware

Schlage 20-079 626 – Frequently Asked Questions

1) Does the Schlage 20-079 rim housing have a fixed tailpiece, or can the tailpiece be changed?
The 20-079 uses a convertible tailpiece cam, so the tailpiece is something you set rather than something locked into the housing. That is the whole idea behind the Schlage modular cylinder: one cylinder converts to three different cylinder types by changing the tailpiece, cam or rear housing. For a locksmith stocking a truck, it means carrying components instead of a complete cylinder for every device on the route.
2) Can a Schlage 20-079 cylinder housing be keyed into the Schlage system already running in my building?
Schlage's modular cylinder supports interchangeability between the Everest 29, Primus XP and Classic key systems, and it is offered in all Schlage keyways. So if the building is already standardized on one of those three, the 20-079 rim housing can be specified to run on the same keys rather than adding a second key system to the facility. Specify the key system and keyway with the order the same way you would for the locks it has to match.
3) I need one cylinder that works on mortise locks, rim devices and key-in-lever locks. Does Schlage's modular cylinder actually do that?
It does, and the 20-079 is the rim configuration of it. The Schlage modular cylinder is adaptable to mortise, rim and key-in-lever or key-in-knob applications, and you move between those types by changing the front and back housing, the tailpiece or the cam rather than buying a different complete cylinder. Practically, that means a shop stocks one cylinder plus a handful of housings and cams instead of three separate cylinder lines.
4) Will a BEST 12E dummy rim cylinder substitute for a Schlage 20-079 rim housing?
They are not interchangeable jobs. The BEST 12E is a dummy rim cylinder with a 1-5/32 inch diameter, so it fills the cylinder hole and presents a cylinder face without operating anything behind the door. The Schlage 20-079 is a working rim housing with a convertible tailpiece cam that transmits key rotation to the device it is mounted on. Order the 12E where an opening needs the face filled and matched visually, such as an inactive leaf or a dummy trim position, and use the 20-079 where the opening is actually keyed.
5) Is there a rim cylinder housing from another manufacturer that does the same job as the Schlage 20-079?
The nearest cross-brand counterpart is the Corbin Russwin 3070, a 6-pin rim cylinder housing in the 3000 series supplied with a 1-7/8 inch tailpiece. The difference is in how each one handles the drive: the Schlage 20-079 carries a convertible tailpiece cam, so the same housing can be set up for the rim application and the core behind it moves into mortise or key-in-lever service by changing the tailpiece, cam or rear housing. The Corbin Russwin 3070 is a dedicated rim housing with its tailpiece length fixed at 1-7/8 inch, so it is specified against the device it is going into rather than reconfigured on the truck. If the building is already keyed on Corbin Russwin, the 3070 stays inside that system; if it is keyed on Schlage, the 20-079 stays inside Everest 29, Primus XP or Classic.
6) I need an interchangeable core cylinder for Schlage L9000 mortise locks. Is the 20-079 the right part?
No. The Schlage 20-079 is the rim housing in the modular cylinder family, so it drives a rim application, not a mortise lock body. For an interchangeable core cylinder that goes into Schlage L9000 mortise locks, the Corbin Russwin 1080 is built for it: a 1-1/2 inch 6-pin LFIC mortise cylinder in the 1080 series, Grade 1, with an A01 Schlage L cam already fitted so it matches the L9000 lock. Staying inside Schlage's own modular system for the same opening means moving the core out of a rim housing and into a mortise rear housing and cam, since the modular cylinder converts to mortise, rim and key-in-lever by changing those parts.
7) The opening takes a mortise cylinder rather than a rim cylinder. What should I order instead of the 20-079?
Two cross-brand mortise housings cover most of that work, and the cam is what decides between them. The Corbin Russwin 1070 is a 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam, and the Corbin Russwin 1000 is a 1-1/2 inch mortise cylinder with an A02 straight cam, both Grade 1 series. Pull the existing cylinder and match the cam shape and the length before ordering, because a cloverleaf and a straight cam engage different lock bodies. The Schlage 20-079 is the rim member of a modular family whose core moves to a mortise application by changing the rear housing and cam, so a shop already standardized on Schlage cores can convert rather than cross brands.
8) Everything in my building is keyed to Schlage C. Which cylinders from other brands key into that system?
The Detex MC65 is a mortise cylinder supplied with a Schlage C keyway, 1-1/8 inch, 6-pin, commercial grade, so it drops into a Schlage C keying schedule on a mortise application without opening a second key system. The Schlage 20-079 covers the rim side of the same schedule and is available in Schlage keyways across Everest 29, Primus XP and Classic, so a facility running Classic C can keep the rim openings and the mortise openings on one key. Confirm the keyway family before ordering, since Everest 29 and Classic are not the same keyway even though both are Schlage.
9) Do I have to order the Schlage 20-079 handed for a left hand or right hand door?
No handing to specify. The 20-079 rim housing is non-handed, so the same part goes on a left hand or right hand opening and you do not need to know which way the door swings before you order. That also means one part number covers both leaves of a pair.
10) The doors on this job are thicker than standard. Will a Schlage modular cylinder still reach?
Thicker doors are handled on the rear housing. The Schlage modular cylinder is offered with six rear housing lengths specifically to accommodate thicker doors, so you match the rear housing length to the door and keep the same cylinder and front housing. That is the part to nail down before ordering when the openings are not standard thickness.
11) What exactly is the Schlage 20-079, the complete cylinder or just the housing?
It is the rim housing, a replacement component of the Schlage modular cylinder rather than a finished assembled cylinder on its own. The system is built from parts: cylinder, front housing, rear housing, tailpiece and cam. You pick the housing for the application (rim, here) and the key system separately, which is exactly why it cuts inventory. Order it with the keyway and finish that match the rest of the openings.
12) I need a rim cylinder housing but the building is not on Schlage keys. What else is there?
The Corbin Russwin 3070 is the other rim cylinder housing to look at, a 6-pin housing from the Corbin Russwin 3000 series with a 1-7/8 inch tailpiece. The difference that matters on the order form: the 3070 is specified with that tailpiece length, while the Schlage 20-079 uses a convertible tailpiece cam and is set up as part of Schlage's modular cylinder system. Pick by the key system the building already runs, since that is what you cannot change on the fly.
13) I am standardized on Schlage keys, but this opening has a mortise lock instead of a rim device. What cylinder do I order?
A rim housing like the 20-079 is not the part for a mortise lock. Two directions here. Stay in the Schlage modular line and change the housing, tailpiece or cam, since the same cylinder converts between mortise, rim and key-in-lever applications. Or go with a dedicated mortise cylinder: the Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder cut to the Schlage C keyway, which keeps you on Schlage keys. If the lock needs a specific cam, the Corbin Russwin 1070 is a 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam, and the Corbin Russwin 1000 is a 1-1/2 inch mortise cylinder with an A02 straight cam. Match the cam to the lock, not to the brand.
14) Narrow stile aluminum storefront with an Adams Rite deadlock. Is a rim housing like the 20-079 what I need?
No, that opening is served by Adams Rite's own cylinder parts. For the MS1847 deadlock and deadlatch, the Adams Rite 4025 is a five pin tumbler cylinder pull with through-screws and the 4024 is a cylinder pull with trim plate mounting, so the choice between them is how the pull fastens to the stile. The Adams Rite 4026 is the five pin tumbler cylinder pull for wood door applications with the 5017 deadlock and deadlatch. If the lock takes a mortise cylinder rather than a pull, the Adams Rite 4036 is a Grade 1 mortise cylinder with five-pin security in the 4036 series and works from a 1/2 inch minimum door thickness. The Schlage 20-079 belongs on rim devices, which is a different mounting condition than a stile-mounted cylinder pull.
15) Can a Schlage 20-079 replace the rim cylinder in a Kwikset deadbolt or an Emtek handleset?
Those openings are served by cylinders built with the matching tailpiece rather than by a commercial rim housing. The Medeco 1012040 is a 6-pin lazy motion rim cylinder made for Kwikset single cylinder deadbolts, the Medeco 1065244 is a 5-pin lazy motion rim type cylinder that comes with an Emtek tailpiece, and the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts generally. The Medeco 1065140 covers the Arrow JL interconnected lock and the Emtek handleset and deadbolt outside cylinder as a 5-pin retrofit. The Schlage 20-079 is a commercial part with a convertible tailpiece cam and is set up for commercial rim devices, so for retrofitting a residential deadbolt or handleset the tailpiece-specific Medeco cylinders are the ones to match.
16) The cylinder I am replacing sits in a lever or knob, not a rim device. What do I order?
A key-in-lever or key-in-knob opening takes a cylinder shaped for that trim, not a rim housing. The Falcon A23161-05 G is a key-in-lever cylinder in the RU/T series, 6-pin G keyway, keyed different and supplied with 2 cut keys. The Kaba Ilco 1539 is a key-in-knob and lever universal cylinder, the 1579 is the knob and lever cylinder for Sargent trim, and the 1599 is a key-in-knob replacement cylinder. Identify the lock brand first, since the Sargent-specific 1579 and the universal 1539 are not the same part. Within the Schlage modular system the same core serves key-in-lever and key-in-knob applications once the rear housing and tailpiece are changed, which is what separates that approach from buying a dedicated cylinder per trim type.
17) What is the difference between the Schlage 20-079 and a BEST interchangeable core such as the 1CB or 1C?
They are two halves of different systems, not competing versions of one part. The BEST 1CB is a Peaks 150 series interchangeable core cylinder and the BEST 1C is a standard 5-pin cylinder core, both of them the removable core itself, keyed within BEST's core program. The Schlage 20-079 is the rim housing that a Schlage full size interchangeable core seats into, with a convertible tailpiece cam and a stainless steel body, and it is what lets one Schlage core serve rim, mortise and key-in-lever openings as the housing changes around it. A building standardized on BEST cores buys the BEST core and its own matching housings; a building standardized on Schlage buys the 20-079 and a Schlage core.
18) The job calls for drill resistance and patented key control. What are the options across brands?
On the BEST side, the 1CDF is a drill resistant patented interchangeable core, 7-pin, brass, in the 150 series, so the protection and the key control both live in the core and travel with it between housings. On the Schlage side, the modular cylinder that the 20-079 rim housing is built around is available in Primus XP as well as Everest 29 and Classic, which is where the patented key control sits in that program. The practical difference for a security integrator is which key system the site is already committed to, since the core and the key blanks have to belong to the same program as the rest of the building.
19) What finishes does the Schlage 20-079 rim housing come in, and can I match it to the lock trim already on the door?
Eleven finishes: 605 Bright Brass, 606 Satin Brass, 609 Antique Brass, 612 Satin Bronze, 613 Oil Rubbed Bronze, 619 Satin Nickel, 622 Matte Black, 625 Bright Chrome, 626 Satin Chrome, 626AM Satin Chrome Antimicrobial and 643E Aged Bronze. Schlage builds the front housing in all finishes to match the locks, so a property manager replacing cylinders across a floor can hold the same look on doors that were originally specified in brass, bronze or chrome.
20) Is there an antimicrobial finish option for the Schlage 20-079 for a hospital or clinic?
Yes, 626AM Satin Chrome Antimicrobial is one of the eleven finishes offered on the 20-079 rim housing. It reads as standard satin chrome alongside 626 hardware, so a healthcare facility standardizing on antimicrobial hardware at high-touch openings can specify it without breaking the finish scheme on the rest of the doors.
21) Is the Schlage 20-079 a commercial-duty part, and what is the housing made of?
Stainless steel, and it is a commercial part rather than a residential one. That matters on the openings these get used on, exterior entries and high-traffic tenant doors where the cylinder face takes weather and constant key use. The material spec is the housing body itself.
22) Do I have to stock a separate rim cylinder and mortise cylinder for a mixed building, or is there one part that covers both?
There are two ways to carry it. The dedicated approach is one part per application: a Corbin Russwin 3070 6-pin rim housing with a 1-7/8 inch tailpiece for rim openings and a Corbin Russwin 1070 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam for mortise openings, each stocked in the finishes the building uses. The modular approach puts the 20-079 rim housing and its convertible tailpiece cam on a common core, where changing the tailpiece, cam or rear housing turns that one cylinder into a rim, mortise or key-in-lever cylinder, with six rear housing lengths available for thicker doors and front housings in the finishes that match the locks. A locksmith carrying a truck stock tends to weigh the modular route on part count; a facility that only ever touches one application type may not need the conversion at all.
How fast can I get the Schlage 20-079 626 delivered?
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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 20-079 626 come with a warranty?
Absolutely. The Schlage 20-079 626 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 20-079 626?
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Product Reviews

  • 5
    large format IC core Rim Housing

    Posted by Chris Cloutier on Dec 11th 2025

    Just what we needed, works great