Master Lock K81KMBOX Key Blank...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$39.35
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Master Lock K81KMBOX Key Blanks for 81/82 and Pro Series Locks with W81KM Cylinders, 50 Pack

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Model: K81KMBOX

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

$39.35
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Master Lock K81KMBOX Key Blanks for 81/82 and Pro Series Locks with W81KM Cylinders, 50 Pack

The Master Lock K81KMBOX is a 50-pack of key blanks specifically designed for compatibility with Master Lock 81/82 Series and Pro Series locks equipped with W81KM Master Lock cylinders. Engineered as a commercial-grade service part, this bulk pack provides facilities managers, locksmiths, and property managers with an efficient supply of key blanks ready for cutting and deployment across compatible lock installations. Each key blank is purpose-matched to the W81KM cylinder profile, ensuring precise fitment and reliable key operation in supported Master Lock hardware.

Key Features

  • Broad Lock Compatibility: Designed specifically for Master Lock 81/82 Series and Pro Series locks fitted with W81KM Master Lock cylinders, ensuring accurate profile matching and dependable operation.
  • Bulk 50-Pack Quantity: Supplied in a convenient 50-count box, making this an efficient and cost-effective solution for commercial facilities, locksmiths, and key management programs.
  • Purpose-Matched Cylinder Profile: Each blank is precision-profiled for the W81KM cylinder, providing consistent key cutting results and smooth operation after duplication.
  • Commercial-Grade Service Part: Classified as a replacement part under the Master Lock service parts program, supporting ongoing cylinder and key maintenance in commercial environments.
  • Ready for Professional Key Cutting: Blanks are supplied uncut, ready for cutting on standard professional key cutting equipment to match existing key codes or bitting specifications.
  • Simplified Inventory Management: The boxed 50-pack format (model K81KMBOX) streamlines parts inventory for facilities with multiple compatible Master Lock installations.

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: K81KMBOX
  • Features: Service Parts/Cylinders and Keys

Typical Applications

  • Commercial Office Buildings with Master Lock 81/82 Series Installations
  • Educational Facilities Managing Pro Series Lock Key Programs
  • Healthcare Institutions Requiring Bulk Key Blank Inventory
  • Retail Establishments Using W81KM Cylinder-Based Locking Systems
  • Industrial and Warehouse Facilities with High-Volume Key Management Needs
  • Locksmith and Key Cutting Service Providers
  • Property Management Companies Overseeing Multiple Commercial Sites

Why Master Lock K81KMBOX?

Master Lock service parts are engineered to exact specifications for seamless compatibility with their corresponding lock series, making the K81KMBOX the reliable choice for maintaining 81/82 and Pro Series lock installations equipped with W81KM cylinders. The 50-pack bulk format reflects Master Lock's commitment to supporting commercial facilities with professional-grade replacement components that simplify key program management and reduce downtime.

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:
K81KMBOX
Features:
Service Parts/Cylinders and Keys

Master Lock K81KMBOX – Frequently Asked Questions

1) Do the K81KMBOX keys come cut or do I have to cut them myself?
They ship uncut. Every blank in the box is supplied blank and is cut on standard professional key cutting equipment to an existing key code or bitting. Plan on a locksmith or an in-house duplicator; there is no factory keying on this pack.
2) I need key blanks for BEST or Arrow cylinders, not Master Lock. What should I order instead?
The K81KMBOX is profiled only for Master Lock W81KM cylinders and will not enter another manufacturer's keyway. For BEST small format interchangeable core work, the BEST 1AF Series patented blank is the key blank equivalent, and BEST also supplies cut operating keys such as the 1A3A2KS531KS681 for A keyway green core. For Arrow 1C keyway, the Kaba Ilco CH1C blank is the nickel silver blank for that profile.
3) Will a Kaba Ilco CH1C key blank work in a Master Lock 81/82 Series padlock with a W81KM cylinder?
No. The Kaba Ilco CH1C is a key blank cut for the Arrow 1C keyway in nickel silver construction, which is a different keyway profile entirely. The Master Lock K81KMBOX blanks are purpose-profiled for the W81KM Master Lock cylinder used in 81/82 Series and Pro Series locks, so an Arrow 1C blank will not enter or turn those cylinders. Match the blank to the cylinder profile, not just to the lock body.
4) Can I use these blanks to key several padlocks alike across a building?
Yes, as long as every padlock in the group uses a W81KM cylinder. Because the blanks are uncut, a locksmith can cut them all to one bitting for keyed-alike operation, or to separate bittings for individual keying. The blank itself sets only the keyway profile; the cutting sets the keying.
5) Is a key blank the same thing as a cut operating key?
No. A blank has the correct keyway profile but no bitting cut into it, so it will slide into the cylinder and do nothing until it is cut. A cut operating key, like the BEST 1A3A2KS531KS681, arrives already bitted to a specific code. Order the K81KMBOX when you have cutting capability or a locksmith; order cut keys when you need them ready to hand out.
6) What is the difference between the Master Lock K81KMBOX blanks and a BEST 1AF patented blank?
The BEST 1AF Series Preferred blank is a patented key blank, meaning duplication is restricted to authorized channels under a controlled key program. The Master Lock K81KMBOX is a standard uncut blank supplied 50 to a box, ready for cutting on ordinary professional key machines to an existing bitting. If your facility needs key control with restricted duplication, the patented BEST blank is the different approach; if you are servicing Master Lock 81/82 or Pro Series cylinders and cutting in house, the K81KMBOX is the matching blank.
7) I need a key that is already cut, not a blank - is the K81KMBOX the right item?
No. The Master Lock K81KMBOX ships as uncut blanks ready to be cut to your existing key codes or bitting. If you need a finished operating key rather than stock to cut, that is a different item class - for example the BEST 1A3A2KS531KS681 is an operating key in the Cut Keys series for a green core, A keyway. Order blanks when you have cutting capability or a locksmith; order a cut key when you need it to work out of the package.
8) Is K81KMBOX a commercial part or a consumer item?
It is classified commercial, and sits in Master Lock's service parts program under cylinders and keys. That is the replacement-parts channel facilities and locksmiths order from to keep existing padlock keying in service, rather than a retail duplicating blank.
9) Which bulk key blank should I stock for a mixed facility running both Master Lock and Arrow cylinders?
You will need both profiles - one blank does not cover both. The Master Lock K81KMBOX covers 81/82 Series and Pro Series locks fitted with W81KM cylinders, and comes 50 to a box for commercial key programs. Arrow 1C keyway openings take the Kaba Ilco CH1C blank instead, which is made in nickel silver for that keyway. Stock each blank against the cylinder count it serves rather than trying to standardize on one.
How fast can I get the Master Lock K81KMBOX 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 Master Lock K81KMBOX come with a warranty?
Absolutely. The Master Lock K81KMBOX 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 Master Lock K81KMBOX?
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 Master Lock K81KMBOX 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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