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Schlage B520-378 Non-Modular Straight Mortise SFIC/FSIC Cam for Adams Rite 4070 Series
The Schlage B520-378 is a non-modular straight mortise cam engineered for use with Small Format Interchangeable Core (SFIC) and Full Size Interchangeable Core (FSIC) cylinder configurations. Designed specifically for compatibility with the Adams Rite 4070 Series, this commercial-grade replacement cam provides a precise, reliable interface between the cylinder and the mortise lock mechanism. Purpose-built as a genuine Schlage part, it delivers the fit and function that professional installers and facility maintenance teams require for dependable mortise lock operation.
Key Features
- SFIC/FSIC Compatibility: Designed to work with both Small Format Interchangeable Core and Full Size Interchangeable Core cylinder formats, providing flexibility for interchangeable core lock systems.
- Non-Modular Straight Cam Design: Straight cam geometry engineered for direct, reliable actuation of the mortise lock mechanism without modular adapters.
- Adams Rite 4070 Series Compatibility: Specifically engineered for use with the Adams Rite 4070 Series mortise lock, ensuring proper fit and function in compatible installations.
- Commercial-Grade Construction: Built to meet the demands of commercial door hardware applications where consistent performance and durability are essential.
- Genuine Schlage Part: An authentic Schlage replacement component that maintains the integrity and performance of the original lock assembly.
- Replacement Part Application: Ideal for restoring proper cam function in existing mortise lock assemblies, minimizing downtime in commercial facilities.
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: Cams & Cam Locks
- Parts and Accessories Type: Replacement Parts
- Commercial/Residential: Commercial
- Product Model: B520-378
- Features: Schlage Parts
Typical Applications
- Commercial Office Buildings with Mortise Lock Systems
- Educational Facilities Using Interchangeable Core Cylinders
- Healthcare Institutions with Adams Rite 4070 Series Hardware
- Government and Municipal Buildings
- Retail Establishments with Commercial Mortise Lock Installations
- Multi-Tenant Residential and Mixed-Use Properties
- Industrial and Warehouse Facilities Requiring Mortise Lock Maintenance
Why Schlage B520?
Schlage replacement parts like the B520-378 are manufactured to the same standards as original equipment, ensuring seamless compatibility and dependable performance in commercial mortise lock applications. Engineered specifically for SFIC/FSIC interchangeable core systems and the Adams Rite 4070 Series, this cam delivers the precision fit that professional-grade door hardware demands in high-use 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:
- Cams & Cam Locks
- Parts and Accessories Type:
- Replacement Parts
- Commercial/Residential:
- Commercial
- Product Model:
- B520-378
- Features:
- Schlage Parts
Schlage B520-378 – Frequently Asked Questions
1) What is the Schlage B520-378 cam used for?
The B520-378 is a straight mortise cam, the small driver that sits on the back of the cylinder and turns the lock's mechanism. It is a replacement part for interchangeable core cylinders, in both small format (SFIC) and full size (FSIC) configurations, and Schlage builds it specifically for the Adams Rite 4070 Series mortise lock. If a key turns in your cylinder but the lock no longer retracts, a worn or wrong cam is usually what you are replacing.
2) Will the Schlage B520-378 cam work on an Adams Rite 4070 mortise lock?
Yes. Schlage lists the B520-378 as built for the Adams Rite 4070 Series, so it is the cam to order when you are fitting a Schlage SFIC or FSIC mortise cylinder into that lock body. Outside the 4070 Series, cam geometry and throw vary by lock maker, so a different cam number applies.
3) What is the difference between a non-modular cam and a modular cam?
Non-modular means the cam mounts straight to the cylinder with no adapter or spacer stack in between. The B520-378 is the non-modular straight type, so it drives the lock directly. Modular cams use an adapter plate to let one cylinder serve several different lock formats. If your existing cylinder was set up with a modular adapter, that is a different part family, not this one.
4) Do I get a cylinder or core with the Schlage B520-378?
No. The B520-378 is the cam only. You supply the SFIC or FSIC cylinder and the core. Order it when the cylinder is fine and you need the correct cam to interface with an Adams Rite 4070 Series mortise lock.
5) Is the Schlage B520 cam rated for commercial use or just residential doors?
Commercial. Schlage classifies the B520-378 as commercial door hardware, and it is the cam used on mortise lock systems in offices, schools, healthcare buildings, government facilities, retail, multi-tenant residential and warehouses. It is a maintenance part for high-traffic openings, not a residential lockset component.
6) Is the B520-378 a genuine Schlage part or an aftermarket copy?
Genuine Schlage. The B520-378 is an authentic Schlage component built to the same standards as the cam supplied with the original cylinder, which matters when you are keeping an existing interchangeable core system working rather than replacing the whole assembly.
7) How many versions of the Schlage B520-378 cam are there to choose from?
One. The B520-378 is a single part number with no finish or handing options, so there is nothing to specify beyond the model itself when ordering for Adams Rite 4070 Series hardware.
How fast can I get the Schlage B520-378 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 B520-378 come with a warranty?
Absolutely. The Schlage B520-378 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 B520-378?
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 B520-378 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.