BEST 3A Series Large Rectangul...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$8.00
$6.18
BEST 3A Series Large Rectangular Shape Blank Key for Commercial Applications

BEST 3A Series Large Rectangular Shape Blank Key for Commercial Applications

(No reviews yet) Write a Review

Model: BES-3A1A1KS473KS800
From the Standard & Premium Keys Collection
$8.00
$6.18

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

$8.00
$6.18
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

BEST 3A Series Large Rectangular Shape Blank Key for Commercial Applications

Professional Key Blank for BEST Combinating and Keying Systems

The BEST 3A Series Large Rectangular Shape Blank Key is designed for use with BEST combinating and keying systems, providing distributors with keys and cores that work together seamlessly. This professional-grade key blank ensures security and integrity of every opening while offering easy maintenance and management throughout deployment. The large rectangular shape design provides enhanced grip and identification capabilities for commercial applications.

Professional Features & Benefits

  • Large Rectangular Shape Design: 3A series configuration provides enhanced grip and visual identification for institutional and commercial use.
  • Seamless System Integration: Works with BEST combinating and keying systems to ensure keys and cores function together reliably.
  • Custom Key Stamping Available: Keys can be personalized to an institution or organization for easier identification and protection against unauthorized duplication.
  • Security and Integrity: Designed to maintain the security and integrity of every opening in your access control system.
  • Easy Maintenance and Management: Simplifies deployment, maintenance, and management throughout the facility lifecycle.
  • Multiple Shape Options: Part of comprehensive key shape series including 1A Standard Bow, 1AP Premium Bow, 2A Large Round, 4A Access Bow, and 9A Blockout Blade configurations.

Technical Specifications

  • Collection: Standard & Premium Keys
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Parts and Accessories Type: Replacement Parts
  • Product Attribute: Parts and Accessories
  • Product Category: Parts and Accessories
  • Product Group: Parts and Accessories
  • Product Subgroup: Key Blanks and Accessories
  • Product Type: Keys
  • Series: Key Blanks
  • Subcategory: Key Blanks and Accessories

Installation & Operation

This key blank is designed for use with compatible BEST lock cylinders and cores. Refer to the parent device installation instructions and manufacturer documentation for proper integration. Ensure compatibility with existing hardware before cutting and deployment.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Institutional Access Control Systems

Why Choose BEST Quality?

BEST combinating and keying systems deliver professional-grade reliability with seamless integration between keys and cores for demanding commercial applications. Custom key stamping options provide enhanced security and identification capabilities. Engineered for institutional and commercial environments where dependable access control performance is essential.

Manufacturer Resources

Key and Core Brochure

Product Specs

Product Group:
Parts and Accessories
Series:
Key Blanks
Product Subgroup:
Key Blanks and Accessories
Product Type:
Keys
Subcategory:
Key Blanks and Accessories
Commercial/Residential:
Commercial
Collection:
Standard & Premium Keys
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Category:
Parts and Accessories
Department:
Door Hardware

BEST BES-3A1A1KS473KS800 – Frequently Asked Questions

1) What is the difference between the control, grandmaster, master, submaster and operating BEST 3A keys?
Those five are the levels in a BEST keying system, and the 3A blank is offered as all five: Control, Grandmaster, Master, Submaster and Operating. An operating key runs a single core's combination. Submaster, master and grandmaster are the ascending levels that open progressively larger groups of openings on one chart. The control key is the one that pulls and installs the interchangeable core itself rather than throwing the bolt. All five arrive as uncut blanks in the same large rectangular 3A bow, so you specify the level you need and cut it to your chart.
2) Will a BEST 3A key blank work in an Arrow, Schlage or Corbin cylinder?
No. The 3A is cut only for BEST keyways (A through R, plus the TB, TC, TD and TE profiles), so it will not enter another manufacturer's cylinder. For an Arrow cylinder on the 1C keyway, the blank to buy is the Kaba Ilco CH1C in nickel silver. Order by the keyway of the cylinder in the door, not by the brand on the lock body, since one brand can be supplied on more than one keyway.
3) The cylinders in this building are Arrow 1C, not BEST. Which key blank do I order?
For Arrow 1C cylinders the blank is the Ilco CH1C, a nickel silver key blank cut to the Arrow 1C keyway. The BEST 3A large rectangular bow blank is for BEST combinating and keying systems and is ordered in a BEST keyway such as A, B, C, D, E, F, G, H, J, K, L, M, N, O, R, TB, TC, TD, or TE. If a facility has both Arrow and BEST cylinders in service, the two take different blanks and neither one cross-cuts to the other.
4) Should I order the 3A bow or the 1A, 2A or 4A BEST key blank?
Bow choice is about handling and identification, not about what the key opens. The 3A is the large rectangular bow, which gives more surface for grip and for reading a stamp at a glance. The rest of the family is the 1A standard bow, the 1AP premium bow, the 2A large round, the 4A access bow and the 9A blockout blade. Pick the 3A when maintenance staff are carrying large rings and need to pick the right key fast, or when you want room for facility stamping. The keyway and the cut are what decide which cores the key runs, so any of these bows can be ordered for the same system.
5) Does the BEST 3A key come cut, or is it a blank I have to cut myself?
It ships as an uncut blank. The 3A is meant to be combinated to your own BEST system, so it needs to be cut to the bitting on your keying chart by whoever maintains the system. Confirm the keyway and the key level (operating, submaster, master, grandmaster or control) against the existing hardware before you cut, because a miscut blank in the right keyway is scrap.
6) Do I need a control key blank to swap BEST interchangeable cores?
Yes, and it is ordered as its own key type. The 3A is available as a Control key blank alongside the operating and master levels. The control key retracts the core retaining lug so the core comes out of the housing, which is how a BEST system gets rekeyed without pulling the lock apart or taking the door out of service. It has to be cut to the control bitting for your system and it has to be in the same keyway as the cores it serves.
7) We have BEST cores on more than one keyway across our buildings. Can we standardize on the 3A blank?
You can standardize the bow without standardizing the keyway. The 3A is stocked across twenty BEST keyways, from A through R and the TB, TC, TD and TE profiles, so every building on a different keyway can still be keyed on the same large rectangular bow. Order blanks per keyway and per key level for each system, then use stamping to tell the buildings apart. That gives maintenance one key shape to recognize while each property keeps its own separate keying.
8) What is the difference between a BEST 3A key blank and an Ilco CH1C blank?
They are blanks for two different keying systems. The Ilco CH1C is a nickel silver blank made to the Arrow 1C keyway and is identified by that single blank designation. The BEST 3A is the large rectangular bow blank for BEST combinating and keying systems, ordered by BEST keyway (A through TE) and by the level it will be cut to, and it accepts custom stamping so keys can be marked to an institution. Both are uncut key blanks, so the choice comes down to which manufacturer's cores are hanging in the doors.
9) The large rectangular bow is too big for our key rings. What other BEST blank shapes are there?
The 3A is the large rectangular bow. The BEST key blank family also includes the 1A standard bow, the 1AP premium bow, the 2A large round, the 4A access bow, and the 9A blockout blade. Bow shape changes grip, how the key reads in the hand, and how much surface there is for stamping; it does not change the keyway, which is selected separately from A through TE. That means a facility can standardize on one BEST keyway and still issue different bow shapes to separate tenants, trades, or key levels.
10) Can BEST 3A keys be stamped with our facility or organization ID?
Yes, stamping is an ordering option on the 3A, specified as key stamp KS208KS800 or KS473KS800. The large rectangular bow carries the marking legibly, which is what makes it useful on an institutional ring where a tech is sorting dozens of keys. Stamping also gives you a visible ownership mark that discourages casual duplication at a hardware counter.
How fast can I get the BEST BES-3A1A1KS473KS800 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-3A1A1KS473KS800 come with a warranty?
Absolutely. The BEST BES-3A1A1KS473KS800 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-3A1A1KS473KS800?
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-3A1A1KS473KS800 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.
!