Falcon 031100 Mortise Cylinder...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$22.93
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Falcon 031100 Mortise Cylinder Hex Nut Replacement Part for Commercial Door Hardware

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Model: 031100-000-30

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

$22.93
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Falcon 031100 Mortise Cylinder Hex Nut, Commercial-Grade Replacement Part

The Falcon 031100 Mortise Cylinder Hex Nut is a genuine Falcon replacement part designed to maintain the integrity and reliable operation of compatible Falcon mortise cylinder assemblies. Engineered for commercial door hardware applications, this hex nut secures the mortise cylinder within the lock body, ensuring stable, consistent performance in demanding environments. As an authentic Falcon component classified under Cylinders and Parts and Accessories, it is the ideal solution for service technicians and facility maintenance professionals requiring factory-matched hardware.

Key Features

  • Genuine Falcon Replacement Part: Factory-matched component designed for direct compatibility with Falcon mortise cylinder assemblies, ensuring proper fit and function without modification.
  • Hex Nut Design: Threaded hex nut configuration provides secure, tool-assisted fastening to maintain firm cylinder retention within the lock body during heavy daily use.
  • Commercial-Grade Construction: Manufactured to Falcon's commercial hardware standards, delivering the durability and dimensional accuracy required for professional door hardware installations.
  • Mortise Cylinder Specific: Designed specifically for use with mortise cylinder applications, supporting the secure anchoring of the cylinder within the mortise lock chassis.
  • Simplified Servicing: Enables quick, cost-effective restoration of existing Falcon lock hardware without full assembly replacement, minimizing downtime in commercial facilities.
  • Falcon Lock Parts Compatibility: Part of the Falcon Lock Parts family, making it straightforward to identify, source, and integrate into authorized Falcon service and maintenance workflows.

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: 031100-000-30
  • Features: Falcon 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 Falcon 031100?

Falcon commercial door hardware components are engineered to deliver consistent, professional-grade performance across demanding commercial environments. The 031100 Mortise Cylinder Hex Nut upholds Falcon's commitment to precision manufacturing, providing maintenance professionals with a reliable, factory-matched part that restores lock assemblies to full operational integrity. For facilities management teams and service contractors, sourcing genuine Falcon parts ensures long-term dependability and compatibility throughout the service life of installed hardware.

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:
031100-000-30
Features:
Falcon Lock Parts

Falcon 031100-000-30 – Frequently Asked Questions

1) What exactly is the Falcon 031100 part, and is it a cylinder or just hardware?
The Falcon 031100 is the threaded hex nut that retains a mortise cylinder in the lock body. It is not a cylinder and it contains no pins or key. Full model designation is 031100-000-30. If you need the keyed cylinder itself, order the cylinder separately; this is the fastener that anchors it in the mortise chassis.
2) My Falcon mortise cylinder keeps turning loose in the door. Is this the part I need?
Most likely yes. A mortise cylinder that spins or backs out is usually a loose or missing retaining nut, and the 031100 is the hex nut that clamps the cylinder into the mortise lock chassis. Replacing just the nut restores the lock without pulling and replacing the whole assembly.
3) Is the Falcon 031100 hex nut a replacement for the mortise cylinder itself?
No. The Falcon 031100-000-30 is a hex nut replacement part that secures a mortise cylinder within the lock body; it contains no pins, keyway, or cam. If the cylinder itself needs replacing, a complete mortise cylinder is the item to order, such as the Corbin Russwin 1000 Grade 1 Series mortise cylinder in 1-1/2 inch length with an A02 straight cam, or the Adams Rite 4036 mortise cylinder with five-pin security.
4) The door uses a rim device, not a mortise lock. Does the Falcon 031100 apply?
No. The Falcon 031100 hex nut is specific to mortise cylinder applications, anchoring the cylinder in a mortise lock chassis. Rim devices take a rim cylinder instead, such as the Schlage 20-021 6-pin rim cylinder with vertical tailpiece cam, the Schlage 20-022 with horizontal tailpiece cam, or the Corbin Russwin 3070 6-pin rim cylinder housing with a 1-7/8 inch tailpiece.
5) Is the Falcon 031100 hex nut a genuine Falcon part or an aftermarket copy?
It is a genuine Falcon component, factory-matched to Falcon mortise cylinder assemblies so it fits without modification. For maintenance crews standardizing on Falcon hardware, that means the thread and dimensions match what came out of the lock.
6) Can I use the 031100 hex nut on a rim cylinder instead of a mortise cylinder?
No. It is specific to mortise cylinder applications, anchoring the cylinder in the mortise lock chassis. Rim cylinders mount through the door with a back plate and screws instead, so a rim unit like the Schlage 20-021 6-pin rim cylinder does not use this nut.
7) We want to move to interchangeable cores instead of servicing fixed cylinders. What should we look at?
The Falcon 031100 hex nut is a maintenance part for existing Falcon mortise cylinder assemblies, so it does not change the keying platform. To convert to interchangeable core, look at the BEST Peaks 1CB 150 Series interchangeable core cylinder, the BEST 1CDF drill resistant patented interchangeable core 7-pin brass 150 Series, or the Corbin Russwin 1080 Grade 1 Series 1-1/2 inch LFIC mortise cylinder, 6-pin, which fits Schlage L9000 mortise locks with an A01 cam.
8) What do I order if the cylinder being serviced is in a knob or lever instead of a mortise lock?
The Falcon 031100 is a mortise cylinder hex nut and does not serve key-in-knob hardware. For knob and lever cylinders, the Kaba Ilco 1539 Series key-in-knob / lever universal cylinder, the 1579 Series knob and lever cylinder for Sargent, or the 1599 key-in-knob replacement cylinder cover those applications. For a key-in-deadbolt, the Kaba Ilco 1549 Series is the deadbolt-function cylinder.
9) We need a non-keyed part for a storefront pull application. Does the 031100 work there?
No. The Falcon 031100 is a threaded hex nut for commercial mortise cylinder retention. Storefront cylinder pull applications use dedicated pulls, such as the Adams Rite 4024 cylinder pull with trim plate mounting or the 4025 five-pin tumbler cylinder pull with through-screws, both for the Adams Rite MS1847 deadlock/deadlatch, with the 4026 five-pin tumbler pull covering the Adams Rite 5017 wood door deadlock/deadlatch. Where a non-keyed cylinder is wanted, the BEST 12E Series dummy rim cylinder measures 1-5/32 inch in diameter.
10) If I am replacing a Schlage C keyway mortise cylinder rather than just the nut, what is comparable?
The Falcon 031100 hex nut only retains a cylinder, so a full cylinder swap needs a cylinder part number. The Detex MC65 mortise cylinder is a 1-1/8 inch 6-pin commercial grade cylinder with a Schlage C keyway, and the Schlage 20-057-C is a full size interchangeable core cylinder in C keyway with a 643E aged bronze finish. The Schlage 20-057 is the 6-pin FSIC rim cylinder with a convertible tailpiece cam if the opening is rim rather than mortise.
11) Is this hex nut rated for commercial use, or is it a residential part?
Commercial. The 031100 is classified as commercial door hardware and is used in offices, schools, healthcare, retail, warehouses, multi-tenant residential buildings and government facilities, where the cylinder has to stay tight under heavy daily key use.
12) How many part options are there for the Falcon 031100, or do I just order the one?
There is a single configuration, 031100-000-30. No finish or size choices to pick, so ordering is one line item per nut.
13) Is there a Falcon-equivalent hex nut from another brand in the cylinder lineup?
The Falcon 031100 is a genuine Falcon factory-matched hex nut built for direct fit on Falcon mortise cylinder assemblies without modification, which is why it is the part to use on Falcon hardware. The other cylinder-family parts alongside it are complete cylinders or cores rather than retention nuts, for example the BEST 1C Series standard 5-pin cylinder core and the Emtek CY4 cylinder.
How fast can I get the Falcon 031100-000-30 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 Falcon 031100-000-30 come with a warranty?
Absolutely. The Falcon 031100-000-30 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 Falcon 031100-000-30?
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 Falcon 031100-000-30 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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