Sargent 10-0042 Lockout Key fo...
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Sargent 10-0042 Lockout Key for 50 Function Commercial Mechanical Locks

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Model: 10-0042

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

$17.77
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Sargent 10-0042 Lockout Key for 50 Function Commercial Mechanical Locks

The Sargent 10-0042 is a purpose-built Lockout Key designed for use with Sargent 50 Function mechanical lock products. Engineered as a genuine Sargent replacement part, this key provides a reliable, manufacturer-specified solution for lockout operations within compatible Sargent lock hardware. Ideal for commercial facilities requiring precise, function-matched keying components to maintain the integrity of their access control and door hardware systems.

Key Features

  • 50 Function Compatibility: Specifically designed for Sargent 50 Function mechanical locks, ensuring precise fit and reliable lockout operation.
  • Genuine Sargent Replacement Part: Manufactured as an authentic Sargent lock part, maintaining the performance standards of the original hardware installation.
  • Commercial-Grade Construction: Built to meet the demands of commercial door hardware applications where consistent, dependable performance is essential.
  • Simplified Lockout Operation: Provides a dedicated keying solution for lockout functions, supporting efficient facility management and access control procedures.
  • Direct Replacement: Serves as a drop-in replacement part, minimizing downtime and simplifying maintenance for compatible Sargent mechanical lock systems.

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: Keys
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 10-0042
  • Features: Sargent Lock 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 Sargent 10-0042?

Sargent mechanical lock parts are engineered to exacting manufacturer specifications, ensuring seamless compatibility and reliable performance within Sargent door hardware systems. The 10-0042 Lockout Key delivers the precision and durability required for commercial applications where maintaining proper lockout function is critical to facility security and access management.

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:
Keys
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
10-0042
Features:
Sargent Lock Parts

Sargent 10-0042 – Frequently Asked Questions

1) What is the Sargent 10-0042 key used for?
The 10-0042 is Sargent's lockout key, made to operate the lockout function on Sargent 50 Function mechanical locks. It is not a cylinder key for everyday entry; it is the dedicated key that puts a compatible 50 Function lock into and out of its lockout state.
2) Will the Sargent 10-0042 lockout key work on any Sargent lock?
No. It is matched to Sargent 50 Function mechanical locks only. If the lock on your door is a different Sargent function, this key will not be the correct part for it. Check the function designation stamped on the lock or on your hardware schedule before ordering.
3) My Sargent lockout key is lost or broken. Can I substitute a key from another brand?
No. Lockout keys are function and manufacturer specific. A BEST operating key for a Green Core A keyway, for example, is cut for a BEST interchangeable core system and has nothing to do with the Sargent 50 Function lockout. Replace a lost Sargent lockout key with the Sargent 10-0042.
4) Can a key blank like the Kaba Ilco CH1C be cut to work as a Sargent lockout key?
No. The Sargent 10-0042 is a purpose-built lockout key made as a genuine Sargent replacement part for Sargent 50 Function mechanical locks, supplied ready to use for lockout operation. The Kaba Ilco CH1C is a key blank for the Arrow 1C keyway in nickel silver construction, so it is an uncut blank on a different manufacturer's keyway and is not a route to a Sargent 50 Function lockout key. Order the 10-0042 when the lockout function on Sargent hardware is what you need.
5) I need an operating key rather than a lockout key. What should I look at instead of the Sargent 10-0042?
The Sargent 10-0042 is dedicated to lockout operation on Sargent 50 Function mechanical locks, not day-to-day operation of a cylinder. For an operating key, the BEST 1A3A2KS531KS681 is a cut operating key for a green core in the A keyway. Choose that route when the need is a working key for a BEST A keyway cylinder, and the 10-0042 when the requirement is the Sargent lockout function itself.
6) Is the 10-0042 a genuine Sargent part or an aftermarket copy?
It is a genuine Sargent replacement part, sold under Sargent model number 10-0042. For facilities standardized on Sargent hardware, that matters: a function-specific key like this has to match the manufacturer's original spec to operate the lockout correctly.
7) Do I need to have this key cut or keyed to my system?
No cutting or keying is involved. The 10-0042 ships as a finished Sargent part matched to the 50 Function lockout operation, so it is a drop-in replacement rather than a blank. If what you actually need is a blank to cut on a machine, that is a different item, such as the BEST 1AF Series patented key blank or the Kaba Ilco CH1C blank for the Arrow 1C keyway.
8) What is the difference between the Sargent 10-0042 and a BEST 1AF patented key blank?
They serve different points in the keying process. The Sargent 10-0042 is a finished lockout key, a genuine Sargent replacement part matched to Sargent 50 Function mechanical locks for lockout operation. The BEST 1AF Series Preferred Patented Blank Key is a key blank, stock to be cut by a locksmith for BEST cylinders. If you are restoring lockout capability on a Sargent 50 Function lock, the 10-0042 is the function-matched part; the 1AF blank belongs to a BEST keying system.
9) Is this key rated for commercial use or is it a residential part?
Commercial. Sargent classifies the 10-0042 as a commercial door hardware replacement part, and it is used in offices, schools, healthcare buildings, retail, warehouses, multi-tenant residential and government facilities running Sargent 50 Function locks.
10) How many do I need to order for a building with multiple 50 Function locks?
The 10-0042 is sold as a single part number with one configuration, so there are no finish or keyway choices to specify. Facilities managers typically buy several: one for the maintenance set, one for the security office, and a spare, since the lockout function cannot be exercised without the matching key.
11) For a commercial facility standardizing replacement keys, how does the Sargent 10-0042 fit alongside cut keys and blanks?
The Sargent 10-0042 is stocked as a commercial replacement part for Sargent door hardware, so it is ordered by part number and needs no cutting to perform lockout on Sargent 50 Function locks. Cut keys such as the BEST 1A3A2KS531KS681 operating key for a green core in the A keyway arrive keyed to a specific combination, while blanks such as the BEST 1AF patented blank and the Kaba Ilco CH1C for the Arrow 1C keyway must be cut before use. A facility program typically carries the function-specific part separately from its cutting stock.
How fast can I get the Sargent 10-0042 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 Sargent 10-0042 come with a warranty?
Absolutely. The Sargent 10-0042 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 Sargent 10-0042?
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 Sargent 10-0042 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.
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