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PDQ I02406 VAULT Great Grand Master Key Cut (GGMKC)
PDQ VAULT and High Security Keys and Key Cuts
These are PDQ factory keys for two closed key systems: the VAULT patented keying system and PDQ high security cylinders and cores. The range covers the VAULT key blank and VAULT master, grand master, great grand master, control and change key cuts, plus high security cut keys for 6-pin cylinders, 7-pin SFIC cores and 6-pin LFIC control keys on the TA keyway.
Key Features
- VAULT keys are tapered to pass the patented VAULT door inside the core, which blocks standard keys
- VAULT is covered by U.S. Patent #12338653 through 2044, and unauthorized duplication of VAULT keys is prohibited
- VAULT keys also operate standard SFIC cores, so a facility can move to VAULT in phases
- High security keys are cut at the factory; blanks for high security cylinders are not sold
- Key cuts cover every level of a master key system, from change key up to great grand master
Technical Specifications
- Manufacturer Part Number: I02406
Frequently Asked Questions
What is a restricted or patented keyway?
A restricted keyway uses key blanks set aside for limited use, so keys and cylinders can only be ordered with authorization. A patented keyway adds legal protection: PDQ VAULT is covered by U.S. Patent #12338653 through 2044, and only authorized distributors can supply VAULT keys and cores.
How does a master key system work?
A master key system groups locks so one key opens many doors while each door keeps its own change key. Levels run from change key to master, grand master and great grand master keys, and PDQ recommends no more than four levels.
Manufacturer Resources
PDQ Keying Systems And Forms
Product Specs
- Department:
- Door Hardware
- Product Group:
- Cylinders, Keys and Strikes
- Product Subgroup:
- Key Blanks and Accessories
- Product Type:
- Key
- Product Category:
- Mechanical Locks
- Product Model:
- I02406
- Commercial/Residential:
- Commercial
- Tags:
- pdq i02406, i02406 pdq, i02406
- Subcategory:
- Cylinders, Cores and Keys
PDQ I02406 – Frequently Asked Questions
1) What exactly is a great grand master key cut, and where does PDQ I02406 sit in a master key system?
The PDQ I02406 is a factory-cut VAULT key at the great grand master (GGMK) level, the top tier of a master key system. Below it run grand master, master, and finally the change key that opens one individual door. PDQ recommends keeping a system to no more than four levels, so a GGMK is normally only specified on large facilities that genuinely need a single key over multiple grand master groups.
2) Will a PDQ VAULT key work in my existing standard SFIC cores?
Yes. VAULT keys operate standard SFIC cores as well as VAULT cores, which is what lets a building convert in phases instead of changing every cylinder at once. The reverse is not true: VAULT keys are tapered to pass a patented door inside the VAULT core, and that door blocks standard keys.
3) Can I get PDQ VAULT keys copied at a hardware store or a local locksmith?
No. VAULT is a patented, closed keying system covered by U.S. Patent #12338653 through 2044, and unauthorized duplication of VAULT keys is prohibited. Keys and cores come only through authorized distributors, so additional GGMK, grand master, master, or change keys have to be ordered against your system rather than cut locally.
4) Is the PDQ I02406 a blank I can cut myself, or does it come cut?
It ships cut at the factory to the great grand master level of your system. PDQ sells a VAULT key blank separately, but for its high security cylinders blanks are not sold at all, those keys are factory cut only.
5) Should I specify VAULT or PDQ high security cylinders on the TA keyway for a new building?
Two different closed systems. VAULT is the patented route: tapered keys, a blocking door in the core, patent protection to 2044, and backward operation of standard SFIC cores so you can phase it in. PDQ high security covers 6-pin cylinders, 7-pin SFIC cores and 6-pin LFIC control keys on the TA keyway, with keys cut at the factory and no blanks sold. Pick VAULT when you want patent-backed key control and a staged conversion; pick the TA high security line when you are matching cylinders already on that keyway.
6) Do I need a control key as well as the master keys when setting up a PDQ VAULT system?
If you are running interchangeable cores, yes, a control key is what pulls the core out of the housing, and it is a separate cut from the change, master, grand master and great grand master keys. PDQ catalogs VAULT control key cuts alongside the master-level cuts, and a 6-pin LFIC control key on the TA keyway for the high security line. Ordering GGMK cuts like the I02406 without the matching control key leaves you unable to rekey cores in the field.
7) What information do I have to supply when ordering a PDQ great grand master key cut?
Because this is a cut key on a closed system, it has to be tied to an existing or new PDQ keying schedule rather than ordered blind. PDQ publishes its keying systems and order forms, which is where the system details, key levels and authorization are recorded: https://zensupply.com/content/pdf/pdq/pdq-keying-systems-and-forms.pdf
8) Is the PDQ I02406 key suitable for residential use or is it commercial only?
It is a commercial door hardware item, intended for keyed commercial cylinders and cores rather than residential locksets. The master keying structure behind it, change through great grand master, is built for facilities with many openings and multiple access groups.
How fast can I get the PDQ I02406 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 PDQ I02406 come with a warranty?
Absolutely. The PDQ I02406 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 PDQ I02406?
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