Schlage Commercial 20-740-XP P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$217.00
$182.04
Schlage 20-740-XP Primus XP Full Size Interchangeable Core (FSIC) in Satin Chrome (626), showing keyway face and core body

Schlage Commercial 20-740-XP Primus XP FSIC Core, Satin Chrome

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Model: 20-740-XP S123 626

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

$217.00
$182.04
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Schlage Primus XP FSIC Interchangeable Core — Model 20-740-XP

The Schlage 20-740-XP is a Full Size Interchangeable Core (FSIC) built on the Primus XP high-security platform. Designed for commercial masterkey systems, this core drops into any FSIC-compatible Schlage lock body and can be swapped or rekeyed using a control key — no disassembly, no locksmith on-site, no downtime. Finished in Satin Chrome (626) to match standard commercial hardware.

Primus XP Security Features

  • Primus XP sidebar technology provides a second layer of key authentication beyond standard pin tumbling, defeating unauthorized key duplication and bump attacks
  • Keys cannot be duplicated without factory authorization — critical for facilities managing access across multiple buildings or tenants
  • ANSI/BHMA Grade 1 commercial-grade construction

FSIC System Compatibility

  • Full Size Interchangeable Core (FSIC) format — compatible with Schlage FSIC-ready lock bodies
  • Control key removal and installation: cores swap in seconds without tools, enabling rapid rekeying during tenant turnover or security events
  • Available in multiple Schlage Primus XP keyways: S123, S124, S135, S145, T125, T145, T234 — select the keyway that matches your existing masterkey system

Specifications

  • Model: 20-740-XP
  • Core Type: Full Size Interchangeable Core (FSIC)
  • Security Series: Primus XP
  • Finish: Satin Chrome (626)
  • Application: Commercial masterkey and grandmaster systems

Manufacturer Resources

Product Specs

Product Group:
Mechanical Locks
Product Subgroup:
Parts and Accessories
Product Type:
Cylinders
Commercial/Residential:
Commercial
Subcategory:
Parts and Accessories
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Model:
20-740
Product Category:
Mechanical Locks
Department:
Door Hardware

Schlage 20-740-XP S123 626 – Frequently Asked Questions

1) Will the Schlage 20-740-XP core fit my existing Schlage lock bodies?
The 20-740-XP is a Full Size Interchangeable Core, so it drops into Schlage lock bodies that are FSIC-prepped. FSIC and small format (SFIC) are not interchangeable prep, so if your lock bodies were ordered with a conventional cylinder or an SFIC housing, this core won't seat. Check that the existing housing takes a full size core before ordering.
2) Which Primus XP keyway should I order to match my existing master key system?
Seven Primus XP keyways are offered on the 20-740-XP: S123, S124, S135, S145, T125, T145 and T234. Pick the one that matches the keyway already in your system, otherwise the core will not accept your existing keys and it won't fold into the master or grandmaster level you already run. If you don't know your keyway, it is stamped on the face of the existing Primus cylinder or on record with whoever set up the system.
3) Do I need a locksmith to swap a Primus XP interchangeable core, or can my maintenance staff do it?
Your own staff can do it. The core comes out and goes back in with a control key, no tools and no taking the lock apart, so a unit turnover or a lost-key situation gets handled in seconds per door by whoever holds the control key. What you do still need a locksmith or your factory-authorized dealer for is the keys themselves and the pinning, since Primus XP keys can't be duplicated without factory authorization.
4) Can I standardize a whole facility on the Schlage 20-740 core and still have separate access levels per department?
That is what the core is built for. It is designed for commercial master key and grandmaster systems, so you can run one core type across every FSIC-prepped opening in the building and still cut individual, department-level, master and grandmaster keys against it. Order every core in the same keyway so they all sit in one system, and hold the control key centrally so facilities can pull and re-issue cores on any door without touching the lock bodies.
5) What is the Sargent equivalent to a Schlage 20-740-XP interchangeable core?
The closest Sargent counterpart is the 10-6300 Signature LFIC removable core cylinder, which ships with a factory-installed cam. Both are removable-core cylinders on a high-security key control platform, so a facility standardizing on Sargent Signature can run the same swap-the-core rekeying practice it would run with the Schlage 20-740-XP Primus XP core. The difference to plan around is format: the Schlage 20-740 is a Full Size Interchangeable Core (FSIC) and the Sargent 10-6300 is an LFIC removable core, so the lock bodies prepped for one are not prepped for the other. Pick the core that matches the prep already in your doors, and match the keyway to your existing masterkey system.
6) I need a high security cylinder for a rim exit device, not an interchangeable core. What should I use?
For a rim application, look at the Sargent Signature 10-34 6-pin rim cylinder with protected key control. It is built as a rim cylinder rather than a removable core, so it drops into a rim device prep directly. The Schlage 20-740-XP is a Full Size Interchangeable Core (FSIC) intended for FSIC-ready Schlage lock bodies, where the core is pulled and replaced with a control key. If the opening is a rim exit device and the housing is not FSIC-prepped, the 10-34 rim cylinder is the format that fits; the FSIC core is the choice when you want tenant-turnover rekeying without pulling hardware.
7) Is the Schlage Primus XP core worth it over a standard pin tumbler cylinder for a multi-tenant building?
The difference is key control. Primus XP adds a sidebar that reads a second cut on the key on top of normal pin tumbling, so a blank cut on an ordinary machine won't turn it and bump attacks don't work. On a building where keys walk out with tenants and contractors, that is what stops the quiet spread of unauthorized copies. If key duplication isn't a live problem for you and you just want fast rekeying, a conventional interchangeable core does that job without the restricted-key program attached.
8) Is the Schlage 20-740-XP core rated for high-traffic commercial doors?
It is ANSI/BHMA Grade 1 construction, the top commercial grade, and it is a commercial part rather than a residential one. That covers entrances, stairwells and tenant doors in office, healthcare, education and multi-family buildings where the door cycles all day.
9) Does the Schlage 20-740-XP core come with keys or a control key?
The 20-740-XP is sold as the core itself, a replacement part on the Primus XP platform. Keying and the control key are set up through your Primus XP key system, since these keys are restricted and cut only under factory authorization. If you already run a Primus XP master key system, order the core in your existing keyway and it goes onto your existing control key and key records.
10) What high security cylinder goes into a mortise lock body instead of an interchangeable core?
The Sargent Signature 10-40 is a 6-pin mortise cylinder with protected key control, threaded for a mortise lock case rather than being a removable core. The Schlage 20-740-XP Primus XP is a Full Size Interchangeable Core, which needs a lock body prepped to accept an FSIC core. A mortise lock that was never specified for interchangeable core takes the mortise cylinder; converting that opening to FSIC means changing the cylinder prep, not just the cylinder. Both approaches keep key control at the cylinder, so the decision is driven by what is already in the door.
11) Can I use a Sargent 10-ALC deadbolt cylinder in place of a Schlage 20-740-XP core?
No. The Sargent 10-ALC is a Signature 6-pin deadbolt cylinder assembly with protected key control, built for a deadbolt, and it is a cylinder assembly rather than a removable core. The Schlage 20-740-XP Primus XP is a Full Size Interchangeable Core that seats in an FSIC-ready Schlage lock body and comes out with a control key. They are both high-security key control parts, which is why they get shopped against each other, but the mounting is different and neither will seat in the other's prep. Specify the deadbolt cylinder for deadbolt hardware and the FSIC core for FSIC-prepped bodies.
12) If I standardize a building on one high security key system, do I have to use one cylinder format everywhere?
No, and in practice you will not. A Schlage program can carry the 20-740-XP Primus XP Full Size Interchangeable Core on FSIC-prepped lock bodies while non-FSIC openings take a fixed cylinder in the matching keyway. A Sargent Signature program works the same way, with the 10-6300 LFIC removable core on core-prepped bodies, the 10-34 rim cylinder on rim devices, the 10-40 mortise cylinder in mortise cases, and the 10-ALC deadbolt cylinder assembly on deadbolts. What has to stay consistent across the building is the key system, not the cylinder housing. On the Schlage side that means picking one Primus XP keyway family, from S123, S124, S135, S145, T125, T145, or T234, and holding it across the facility.
13) Will the 626 satin chrome core match the rest of my door hardware?
Satin chrome 626 is the standard commercial finish and it is what most levers, exit devices and closers in a commercial building are specified in, so the core face will read the same as the trim around it. The 20-740-XP is offered in 626 only, so if your openings are standardized on bright brass or oil-rubbed bronze the core face will not match the surrounding trim.
How fast can I get the Schlage 20-740-XP S123 626 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 20-740-XP S123 626 come with a warranty?
Absolutely. The Schlage 20-740-XP S123 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 20-740-XP S123 626?
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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