BEST 6CF 150 Series 7-Pin Bras...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$118.56
BEST BEST 6CF 150 Series 7-Pin Brass Preferred Patented Cores for 4S Cylinders BES-6CF

BEST 6CF 150 Series 7-Pin Brass Preferred Patented Interchangeable Core for 4S Cylinders

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Model: BES-6CF71P1626
From the Preferred Patented Cores Collection
$118.56
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BEST 6CF 150 Series 7-Pin Brass Preferred Patented Interchangeable Core for 4S Cylinders

Professional Interchangeable Core Solution for 4S Cylinder Applications

The BEST 6CF 150 Series delivers professional-grade interchangeable core technology specifically designed for 4S cylinder applications. This 7-pin brass core features BEST’s patented Preferred system technology, providing backwards compatibility with all BEST Peaks systems and other major brands of locking hardware. The patented system design ensures reliable performance while enabling universal keying system replacements or upgrades that are both simple and economical.

Professional Features & Benefits

  • 7-Pin Brass Construction: Precision-manufactured 7-pin brass core provides reliable operation and long-term durability in commercial applications.
  • 4S Cylinder Compatibility: Specifically engineered for seamless integration with 4S cylinder systems for versatile installation options.
  • Patented Preferred System: Protected by patent through 2024, ensuring exclusive technology advantages and system integrity.
  • Universal Compatibility: Backwards compatible with all BEST Peaks systems and other major brands of locking hardware for flexible system integration.
  • Masterkey Capability: Designed for masterkeyed applications providing convenient access control and customized security levels.
  • Interchangeable Core Technology: Proven BEST interchangeable core design allows easy combination changes and field service without cylinder removal.
  • Industry Standard Equipment: Utilizes standard key cutting equipment for simplified key duplication and system maintenance.
  • Quality Manufacturing: Manufactured to stringent BEST quality standards ensuring consistent performance and reliability.

Technical Specifications

  • Collection: Preferred Patented Cores
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Parts and Accessories Type: Replacement Parts
  • Product Attribute: Parts and Accessories
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Product Subgroup: Cylinders
  • Product Type: Cylinders
  • Series: 6CF Series
  • Subcategory: Parts and Accessories

Installation & Operation

This interchangeable core is designed for use with compatible 4S cylinder systems. Refer to the parent cylinder installation instructions and manufacturer documentation for proper integration. Ensure compatibility with existing hardware before installation.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Retail Establishments

Available Core Types

  • 1CF: BEST Preferred I/C 7-pin brass 150 series
  • 1CDF: BEST Preferred drill resistant I/C 7-pin brass 150 series
  • 3CF: BEST Preferred I/C for 8E cylinder 7-pin brass 150 series
  • 6CF: BEST Preferred I/C for 4S cylinder 7-pin brass 150 series

Why Choose BEST Quality?

BEST interchangeable core technology delivers professional-grade reliability with precision-manufactured 7-pin brass construction and patented system design. Backed by BEST’s masterkey and key management expertise, this core provides proven performance in demanding commercial applications. The stringent quality manufacturing standards ensure consistent operation and long-term dependability where reliable access control is essential.

Manufacturer Resources

Preferred Patented Key System

Product Specs

Product Group:
Parts and Accessories
Series:
6CF Series
Product Subgroup:
Cylinders
Product Type:
Cylinders
Subcategory:
Parts and Accessories
Commercial/Residential:
Commercial
Collection:
Preferred Patented Cores
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST BES-6CF71P1626 – Frequently Asked Questions

1) What cylinder does the BEST 6CF core actually go into?
The 6CF is BEST's Preferred patented interchangeable core built specifically for 4S cylinders. It is a core only, not a complete cylinder, so you need the 4S cylinder housing already in the door or ordered alongside it. If your housing is an 8E cylinder instead, the matching core in the same family is the 3CF, and for standard BEST I/C housings it is the 1CF.
2) Which keyways can I get the BEST 6CF core in?
Six Preferred keyways: 1P, 2P, 7P, 8P, 9P and 10P. The keyway has to match the keys already issued for that system, so pull it off your existing core's keymark rather than guessing. Mixing keyways inside one building is a common way to end up with a core that will not accept the master key.
3) Will a BEST Preferred core work in a keying system we already run on BEST Peaks?
Yes. The Preferred patented system is backwards compatible with all BEST Peaks systems and with other major brands of locking hardware, which is what lets a facility swap or upgrade a keying system without replacing every housing. Keys are cut on standard key cutting equipment.
4) Should I order the 6CF core combinated or uncombinated?
Both are offered. Order combinated if you want the core pinned to your existing system at the factory, and supply the keymark and marking number from your key records when you do; those are the two fields the order asks for. Uncombinated is the right pick if your locksmith or in-house shop pins cores themselves off a pinning kit.
5) What if my opening uses a mortise or rim cylinder instead of a BEST 4S housing?
Then the 6CF core is the wrong part, because it only seats in a 4S cylinder. For a mortise prep, a conventional cylinder like the Corbin Russwin 1000 Grade 1 series in 1-1/2 inch with an A02 straight cam fits a standard mortise lock body; for a rim device, the Schlage Commercial 20-021 rim cylinder with a vertical tailpiece cam or the 20-022 with a horizontal cam covers most exit devices. Match the cam or tailpiece to the lock, not just the pin count.
6) Is the BEST 6CF core the same thing as a Schlage 20-057 full size interchangeable core?
No. The BEST 6CF is a 7-pin brass Preferred patented interchangeable core made for 4S cylinder housings, ordered by keyway in 1P, 2P, 7P, 8P, 9P or 10P. The Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam, and the Schlage 20-057-C is a full size interchangeable core in the C keyway with a 643E aged bronze finish. They are different core formats on different key systems, so a 6CF core will not drop into Schlage FSIC hardware.
7) What should I use if my opening needs a mortise cylinder instead of an interchangeable core for a 4S housing?
The BEST 6CF is a core only - it seats in a 4S cylinder housing and does not thread into a mortise lock case by itself. For a mortise prep, the Corbin Russwin 1000 Grade 1 mortise cylinder is offered at 1-1/2 inch length with an A02 straight cam, and the 1070 Grade 1 housing at 1-1/4 inch 6-pin with an A01 cloverleaf cam. If the mortise lock is a Schlage L9000, the Corbin Russwin 1080 is a 1-1/2 inch 6-pin LFIC mortise cylinder with an A01 Schlage L cam.
8) Can I rekey a key-in-knob or deadbolt lock with a BEST 6CF core?
Only if that lock accepts a 4S interchangeable core housing - the 6CF is a 7-pin Preferred patented core built for 4S cylinders. For standard key-in-knob and deadbolt retrofits, the Kaba Ilco 1539 is a key-in-knob/lever universal cylinder, the 1549 is a key-in-deadbolt cylinder, the 1579 is a knob and lever cylinder for Sargent, and the 1599 is a key-in-knob replacement cylinder. Falcon also offers the A23161-05 G key-in-lever cylinder with a 6-pin G keyway, keyed different with 2 cut keys.
9) Will a BEST 6CF core work in an Adams Rite narrow stile aluminum door deadlock?
No. The 6CF is a 7-pin Preferred patented core for BEST 4S cylinder housings in commercial door hardware. Adams Rite narrow stile deadlocks use their own cylinder pulls and mortise cylinders: the 4024 cylinder pull mounts with a trim plate for the MS1847 deadlock/deadlatch, the 4025 is a five pin tumbler cylinder pull with through-screws for the same MS1847, the 4026 is a five pin tumbler pull for the 5017 wood door deadlock/deadlatch, and the 4036 is a Grade 1 five-pin mortise cylinder rated for a 1/2 inch minimum door thickness.
10) Can I rekey a building without pulling the locks apart if I use these cores?
That is the point of interchangeable core. With a control key the core lifts out of the 4S cylinder and a newly combinated core drops in, so combination changes and tenant turnovers happen at the door with no lock disassembly. For a property manager running turnover across many units, you keep a stock of pinned cores and swap rather than rekey on site.
11) Does the BEST 6CF give me restricted key control?
Yes. The Preferred core is a patented system, which is what keeps blanks off the open market and stops a tenant walking into a hardware store to copy a key. If key control is not a requirement for you and you just need a replacement cylinder, a standard non-patented option such as the Schlage Commercial 20-057 full size interchangeable core is the simpler route.
12) Can these cores be masterkeyed across a whole facility?
Yes, they are built for masterkeyed applications, which is how a facility runs grand master, master and change key levels off one system. Order combinated with your keymark and marking number and the cores come pinned into that hierarchy; order uncombinated if your shop pins to the system chart in house.
13) What is the difference between the BEST 6CF core and the 1CF, 1CDF and 3CF cores?
All four are BEST Preferred 7-pin brass 150 series interchangeable cores on the same patented Preferred key system. The 6CF is built for 4S cylinders and the 3CF for 8E cylinders, while the 1CF is the standard Preferred interchangeable core and the 1CDF is the drill resistant version of that core. Pick by the cylinder housing already in the door. The 6CF is offered in 606 satin brass, 612 satin bronze, 613 satin bronze oil-rubbed and 626 satin chrome, combinated or uncombinated.
14) I need a rim cylinder for an exit device, not a core. What are my options?
The BEST 6CF is an interchangeable core sized for 4S cylinder housings, so it is not a rim cylinder on its own. For rim applications, the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam, both supplied with 2 keys. The Corbin Russwin 3070 is a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece.
15) If I do not need a high security patented key system, is there a simpler cylinder option?
The BEST 6CF runs on the patented Preferred key system, which restricts key blanks and supports masterkeying across a facility. If the opening does not call for a restricted system, a conventional cylinder such as the Detex MC65 mortise cylinder in the Schlage C keyway, 1-1/8 inch and 6-pin, or the Emtek CY4 cylinder covers basic keyed function. Those use open keyways, so they will not integrate with a Preferred keying system.
16) My residential handleset and deadbolt need an upgraded cylinder - is the BEST 6CF the right part?
The 6CF is a commercial interchangeable core for 4S cylinder housings, so it is not a handleset retrofit. For that work, Medeco offers the 1075127 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1065244 5-pin rim lazy motion cylinder with an Emtek tailpiece, the 1065140 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders, and the 1012040 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts.
17) What finishes does the BEST 6CF core come in, and does the finish have to match my lock?
Four: 606 satin brass, 612 satin bronze, 613 oil-rubbed satin bronze, and 626 satin chrome. Only the visible core face shows once it is seated in the 4S cylinder, so match it to the lock trim on the door. Across a building, 626 satin chrome is the usual default on commercial openings.
18) Is the 6CF core rated for commercial traffic, or is it a residential part?
Commercial. BEST lists it for office buildings, schools, healthcare, government and municipal facilities, industrial and warehouse space, multi-tenant residential and retail. The brass 7-pin construction and the patented key control are aimed at facilities that need key duplication controlled, not at a house.
How fast can I get the BEST BES-6CF71P1626 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 BEST BES-6CF71P1626 come with a warranty?
Absolutely. The BEST BES-6CF71P1626 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 BEST BES-6CF71P1626?
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 BEST BES-6CF71P1626 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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