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PDQ HSC906 High Security LFIC Core, Schlage Compatible, 6-Pin
PDQ High Security Cylinders, Cores and Cams
PDQ High Security cylinders and cores add mechanical barriers that a standard pin tumbler core does not have, resisting drilling, picking and casual key copying. The family covers key in knob/lever cylinders, mortise/rim combo and mortise cylinders, small format (SFIC) and large format Schlage compatible (LFIC) interchangeable cores, and high security cams for the mortise cylinders.
Two levels are offered. Standard High Security cylinders use two hardened anti-drill pins and a proprietary PDQ keyway with a sidebar. High Security cylinders and cores use a minimum of 11 anti-drill and stainless steel pins. Because the sidebar keyway blank is not a standard retail key wall profile, duplication is limited to controlled sources.
Key Features
- Proprietary PDQ keyway with sidebar, a second locking element separate from the pin stack
- Standard High Security: 2 hardened anti-drill pins; High Security: minimum of 11 anti-drill and stainless steel pins
- Key in knob/lever, mortise/rim combo (1-1/8") and mortise (1-1/4" and 1-1/2") cylinder formats
- SFIC cores in 6-pin and 7-pin and an LFIC Schlage compatible 6-pin core
- Cams to suit Adams Rite, Accentra (Yale), Russwin/PDQ, Falcon, Schlage and Sargent offset type mortise applications
- Cylinders include 2 cut keys; cores include keying charges and 2 cut keys
- Not available 0 bitted, and key blanks for high security cylinders are not sold
Technical Specifications
- Standard high security: 2 hardened anti-drill pins; proprietary PDQ keyway with sidebar
- High security: Minimum of 11 anti-drill and stainless steel pins
- Includes: Cylinders include 2 cut keys; cores include keying charges and 2 cut keys
- Restrictions: Not available '0' bitted; key blanks for high security cylinders not available; LFIC mortise & rim housings do not include IC core
- Manufacturer Part Number: HSC906
Available Options
- Finish: 626 - Satin Chrome
- Also selected when ordering: Keying
Typical Applications
- Server and data rooms
- Evidence and records storage
- Pharmacy or narcotics cabinets
- Exterior perimeter entries
Frequently Asked Questions
What makes a cylinder core high security instead of standard?
PDQ High Security cores add hardened anti-drill pins plus a proprietary keyway with a sidebar, mechanical barriers a standard pin tumbler core does not have. A standard core relies on the pin stack alone.
Which PDQ products do the high security cores work with?
PDQ lists them as compatible with its GP, SD and CL Series Grade 2 locks, KV Series deadbolts, and trim including 6T thumb latches, 4P plate pulls, 4GW grip pulls and 6S rose trim.
Is PDQ High Security the same as the VAULT keying system?
No. High Security is a proprietary sidebar keyway with hardened anti-drill pins in a familiar cylinder format. VAULT is a separate PDQ platform built around a patented tapered gate (U.S. Patent #12338653).
Manufacturer Resources
PDQ Cylinder Core Keying Brochure
Product Specs
- Department:
- Door Hardware
- Product Group:
- Mechanical Locks
- Product Subgroup:
- Cylinders and Cores
- Product Type:
- Cylinder / Core
- Product Category:
- Mechanical Locks
- Product Model:
- HSC906
- Commercial/Residential:
- Commercial
- Series:
- High Security
- Tags:
- pdq hsc906, hsc906 pdq, hsc906
- Subcategory:
- Cylinders, Cores and Keys
PDQ HSC906626 – Frequently Asked Questions
1) Will the PDQ HSC906 core drop into my existing Schlage large format interchangeable core locks?
The HSC906 is a large format interchangeable core (LFIC) built to the Schlage compatible format, 6-pin, so it goes into housings and locks that take a Schlage-style LFIC. PDQ also lists it as working with its own GP, SD and CL Series Grade 2 locks, KV Series deadbolts, and 6T thumb latches, 4P plate pulls, 4GW grip pulls and 6S rose trim. Note that PDQ LFIC mortise and rim housings ship without a core, so the HSC906 is what fills them.
2) Can I get keys copied for the PDQ HSC906 at a hardware store?
No, and that is the point of it. The sidebar key blank is not a standard retail key wall profile, so duplication is limited to controlled sources. PDQ does not sell key blanks for its high security cylinders at all. If your site needs keys cut locally on demand, a high security core is the wrong choice; a standard pin tumbler core in a common keyway is what you want.
3) What do I have to specify when ordering a PDQ HSC906 core, and what comes in the box?
Keying is a required selection: keyed different (KD), keyed alike (KA), or master keyed (MK, which carries a master keying charge). Finish is 626 satin chrome. The core ships with keying charges included and 2 cut keys. It cannot be ordered 0 bitted, so you can't buy it uncombinated and pin it yourself on site.
4) I need to key a dozen doors in a building to one key but keep a master for staff. Can the HSC906 do that?
Yes. Order the cores keyed alike (KA) so one key operates all of them, or master keyed (MK) if you need a master over separate change keys, which adds a master keying charge. Because these are interchangeable cores, you can also pull and swap them later without taking the locks apart, which is how most property managers rekey after a turnover.
5) Should I use the 6-pin LFIC core or a PDQ SFIC core?
It depends on the prep you already have, not on security level. The HSC906 is the large format Schlage compatible core, so it suits housings and locks cut for a Schlage-style LFIC. PDQ's high security small format (SFIC) cores come in 6-pin and 7-pin and fit SFIC prepped housings instead. Both tiers use the same proprietary sidebar keyway, so pick by the format your hardware is already prepped for. PDQ also offers key in knob/lever, mortise/rim combo in 1-1/8 inch, and mortise cylinders in 1-1/4 and 1-1/2 inch if you need a fixed cylinder rather than a core.
6) Is PDQ High Security the same keying system as PDQ VAULT?
No, they are separate platforms and the keys are not interchangeable. High Security, including the HSC906 core, is a proprietary sidebar keyway with hardened anti-drill pins in a familiar cylinder format. VAULT is a different PDQ system built around a patented tapered gate. Standardize a facility on one or the other, not both.
7) Is a high security core like the HSC906 worth it for a server room or a narcotics cabinet?
That is exactly the application PDQ aims it at: server and data rooms, evidence and records storage, pharmacy or narcotics cabinets, and exterior perimeter entries. The draw in those spaces is resistance to drilling and picking plus controlled key duplication, so a key cannot be copied casually by someone with access. It is a commercial door hardware product, not a residential one.
8) What finish does the PDQ HSC906 core come in?
One finish only, 626 satin chrome, ordered as HSC906626. Since the core sits inside the lock housing, the visible finish on the opening is set by your lockset or trim, not by the core.
How fast can I get the PDQ HSC906626 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 PDQ HSC906626 come with a warranty?
Absolutely. The PDQ HSC906626 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 HSC906626?
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