BEST 1EK Series High Security ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$285.00
$200.96
BEST High Security Non-UL 7-Pin Mortise Cylinder Less Core, 1-5/32" Diameter BES-1EHS-LESSCORE

BEST 1EK Series High Security 7-Pin Mortise Cylinder Less Core with 1-5/32" Diameter

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Model: 1EK7K4-C4RP3626-LC
From the E Series Cylinders Collection
$285.00
$200.96
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$285.00
$200.96
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BEST 1EK Series High Security 7-Pin Mortise Cylinder Less Core with 1-5/32" Diameter

Professional High Security Mortise Cylinder Solution

The BEST 1EK Series high security mortise cylinder delivers professional-grade security for demanding commercial applications. This 7-pin mortise cylinder features a 1-5/32" diameter with 1.150-32 (NS-2A) threaded construction and 1-11/16" mounting length. Built with brass cylinder construction and stainless steel ring, this cylinder conforms to ANSI A156.5 mortise cylinder Grade 1A standards for superior performance and reliability.

Professional Features & Benefits

  • Precision Dimensions: 1-5/32" diameter with 1.150-32 (NS-2A) threaded design and 1-11/16" mounting length for exact mortise lock compatibility.
  • High-Security Construction: Hardened stainless steel alloy ring, face and keyway disc provide exceptional resistance to tampering and forced entry attempts.
  • Grade 1A Performance: Conforms to ANSI A156.5 mortise cylinder Grade 1A standards for commercial-grade durability and security.
  • Premium Materials: Brass cylinder construction with stainless steel ring and 630 nickel-plated satin stainless steel finish for long-lasting performance.
  • Wrench-Resistant Design: High-security cylinder rings machined from stainless steel, hardened, and nickel plated to prevent unauthorized removal.
  • Factory Combinated: 1EJ7J4 cylinder must be combinated at factory for UL437 compliance, while 1EK7K4 offers flexibility for non-UL applications.
  • Interchangeable Core Ready: Designed for use with special 5C interchangeable core system for master key flexibility.

Technical Specifications

  • Collection: E Series Cylinders
  • Commercial/Residential: Residential
  • 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: 1EK Series
  • Subcategory: Parts and Accessories

Installation & Operation

This replacement cylinder is designed for use with compatible BEST mortise lock systems. Refer to the parent device installation instructions and manufacturer documentation for proper integration. Ensure compatibility with existing hardware before installation. Special door preparation required with 1-3/4" diameter hole for proper cylinder ring installation.

Professional Applications

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

Why Choose BEST Quality?

BEST high security cylinders deliver professional-grade reliability with hardened stainless steel construction and Grade 1A performance standards. The precision-machined components and wrench-resistant design provide exceptional security for demanding commercial applications. Engineered for high-security environments where dependable performance and tamper resistance are essential.

Manufacturer Resources

E Series Service Manual

Product Specs

Series:
1EK Series
Subcategory:
Parts and Accessories
Product Group:
Parts and Accessories
Product Subgroup:
Cylinders
Product Type:
Cylinders
Commercial/Residential:
Residential
Collection:
E Series Cylinders
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST 1EK7K4-C4RP3626-LC – Frequently Asked Questions

1) Does the BEST 1EK mortise cylinder come with a core, or do I need to order one separately?
It ships less core. The 1EK Series high security mortise cylinder is a housing built to take a BEST special 5C interchangeable core, so you order the core and keying separately and drop it in. That is what a lot of facilities want: the housing gets installed by the contractor, and the locksmith or in-house security staff cores it to the building's master key system afterward.
2) What size hole does the door need for the BEST 1EK high security cylinder ring?
Special door prep is required: a 1-3/4 inch diameter hole so the high security cylinder ring seats properly. That is larger than a standard cylinder prep, so if you are retrofitting an existing opening, check the hole before you order. The cylinder itself is 1-5/32 inch diameter with 1.150-32 (NS-2A) threads and a 1-11/16 inch mounting length.
3) Will the BEST 1EK cylinder thread into my existing mortise lock?
It uses the 1.150-32 (NS-2A) thread on a 1-5/32 inch diameter body, which is the standard mortise cylinder thread, with a 1-11/16 inch mounting length. If your mortise lock case is prepped for a standard threaded mortise cylinder, it will thread in. The variable to confirm is the cylinder length relative to your door thickness and the cam your lock needs.
4) What cam options are available on the BEST 1EK mortise cylinder?
Three drive choices: a standard cam, a standard spindle, or an Adams Rite MS cam. The Adams Rite MS cam is the one to pick if the cylinder is driving an Adams Rite MS deadlock in an aluminum storefront door; the standard cam covers conventional mortise lock cases. Picking the wrong cam is the single most common reason a correctly threaded cylinder will not throw the bolt.
5) Is the BEST 1EK cylinder rated to a commercial grade?
It conforms to ANSI A156.5 mortise cylinder Grade 1A, which is the top performance tier for mortise cylinders. Construction is brass body with a hardened stainless steel alloy ring, face and keyway disc for drill and tamper resistance. For a spec that calls for a high security Grade 1A cylinder on office, healthcare, education or government openings, this meets it.
6) Do I have to have BEST keys cut at the factory for this cylinder?
Not for the 1EK7K4. The 1EJ7J4 must be combinated at the factory to hold its UL437 compliance, but the 1EK7K4 is the non-UL version and can be combinated in the field, which is why most locksmiths and in-house shops pick it. If a UL437 listing is written into your spec, the field-combinated version will not satisfy it.
7) For an aluminum storefront with an Adams Rite MS deadlock, is the BEST 1EK the right cylinder or should I use an Adams Rite cylinder?
Either route is workable depending on how you key the building. The BEST 1EK Series can be ordered with an Adams Rite MS cam, which lets a BEST interchangeable core keying system carry onto an MS deadlock, and the cylinder itself is a 7-pin design conforming to ANSI A156.5 Grade 1A. On the Adams Rite side, the 4036 is a five-pin mortise cylinder rated Grade 1 with a 1/2 inch minimum door thickness, and if the opening uses an MS1847 deadlock the 4024 cylinder pull mounts with a trim plate while the 4025 is a five-pin cylinder pull with through-screws. The 4026 five-pin cylinder pull is the wood door version for the Adams Rite 5017 deadlock.
8) Can I use the BEST 1EK Series mortise cylinder in place of a rim cylinder on an exit device?
No. The BEST 1EK Series is a threaded mortise cylinder with a 1.150-32 (NS-2A) thread and 1-11/16 inch mounting length that screws into a mortise lock body, and it is ordered less core with cam or spindle options including a standard cam, standard spindle, or an Adams Rite MS cam. A rim device needs a rim-format cylinder with a tailpiece: the Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam, the 20-022 is the same in a horizontal tailpiece cam, and the Corbin Russwin 3070 is a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece. The mounting formats are not interchangeable.
9) What is a comparable mortise cylinder to the BEST 1EK Series if I need a fixed-core cylinder rather than an interchangeable core?
The BEST 1EK Series is a 7-pin mortise cylinder supplied less core, built for the special 5C interchangeable core system, so the core is installed separately and can be swapped for rekeying. If you want a conventional mortise cylinder that comes as a complete housing with the cam already specified, the Corbin Russwin 1000 Grade 1 Series mortise cylinder is offered in a 1-1/2 inch length with an A02 straight cam, and the Corbin Russwin 1070 Grade 1 Series is a 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam. Those are pinned conventional cylinders, not interchangeable-core carriers, so rekeying is done at the pin stack rather than by pulling a core.
10) I need an interchangeable core cylinder but my locks are Schlage keyed. What should I use instead of the BEST 1EK?
The BEST 1EK Series is built around the BEST-style special 5C interchangeable core and is ordered less core. For a Schlage-keyed opening, the Schlage 20-057 is a 6-pin full size interchangeable core 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. Note the difference in application: the 1EK is a threaded mortise cylinder with a 1.150-32 (NS-2A) thread and 1-11/16 inch mounting length for a mortise lock body, while the Schlage 20-057 parts are rim-format FSIC.
11) My opening has a key-in-lever lockset, not a mortise lock. Is the BEST 1EK a substitute?
It is not. The BEST 1EK Series is a threaded mortise cylinder requiring special door prep with a 1-3/4 inch hole for the high-security cylinder ring, and it seats in a mortise lock body. A key-in-lever or key-in-knob lockset takes a different cylinder format: the Kaba Ilco 1539 Series is a key-in-knob and lever universal cylinder, the 1579 Series is a knob and lever cylinder for Sargent, the 1599 Series is a key-in-knob replacement cylinder, and the Falcon A23161-05 G is a key-in-lever cylinder with a 6-pin G keyway supplied keyed different with two cut keys. For a key-in-deadbolt, the Kaba Ilco 1549 Series is the deadbolt cylinder.
12) I am putting interchangeable cores into Schlage L9000 mortise locks. Does the BEST 1EK fit, or is there a better match?
The BEST 1EK Series is an interchangeable-core-ready mortise cylinder ordered less core for the special 5C core, and it is offered with a standard cam, standard spindle, or Adams Rite MS cam. If the cam you need is the Schlage L cam for L9000 mortise locks, the Corbin Russwin 1080 Grade 1 Series is a 1-1/2 inch LFIC mortise cylinder, 6-pin, listed for Schlage L9000 mortise locks with an A01 Schlage L cam. That is a large format interchangeable core cylinder rather than the BEST 5C core system, so choose based on which core family the building is keyed to.
13) What ring styles can I get with the BEST 1EK cylinder?
Five ring choices: 3E mortise, 6-pin mortise, 7-pin mortise, rim cylinder, and tapered cylinder. The ring is what dresses the face of the cylinder to the door or lock trim and, on this high security version, it is machined from stainless steel, hardened and nickel plated so it resists being wrenched off. Match the ring to the cylinder length and the trim you are mounting against.
14) What are the alternatives to the BEST 1EK if I do not run BEST interchangeable cores?
For a conventional threaded mortise cylinder, the Corbin Russwin 1000 Series Grade 1 in 1-1/2 inch length with an A02 straight cam, or the 1070 Grade 1 6-pin housing in 1-1/4 inch with an A01 cloverleaf cam, cover most mortise cases. If you are on Schlage L9000 mortise locks and want an interchangeable core, the Corbin Russwin 1080 is a 1-1/2 inch LFIC 6-pin built for L9000 with the A01 Schlage L cam. The BEST 1EK is the pick only when the building is keyed on BEST 5C cores or you need Grade 1A high security.
15) Can I use a BEST 7-pin cylinder to standardize keying across a whole facility?
That is the point of it. The 1EK is a 7-pin housing built for the BEST special 5C interchangeable core system, so every opening you fit with one can be recored and remastered without pulling the cylinder out of the lock. For a campus or hospital running multiple master levels, that is the difference between a rekey that takes an afternoon and one that takes a week. Order the housings in one finish, then core them to your keying schedule.
16) What keeps someone from just unscrewing the BEST 1EK cylinder out of the door?
The high security ring. It is machined from stainless steel, hardened and nickel plated specifically to resist wrenching, and the face and keyway disc are hardened stainless steel alloy as well. That is the reason for the larger 1-3/4 inch door prep, since the ring needs the extra diameter to seat. On exterior and after-hours openings that is the attack a standard brass cylinder collar does not survive.
17) What is a simpler mortise cylinder option if I do not need the high security features of the BEST 1EK?
The BEST 1EK Series carries hardened stainless steel alloy ring, face and keyway disc for tamper and wrench resistance, is 7-pin, and conforms to ANSI A156.5 Grade 1A. If the opening does not call for that level, the Detex MC65 is a 6-pin mortise cylinder in a 1-1/8 inch size with a Schlage C keyway, and the Adams Rite 4036 is a five-pin mortise cylinder rated Grade 1. Both are conventional pinned cylinders without the hardened high-security ring and disc package, and both key into their own keyways rather than a BEST interchangeable core system.
18) Is the BEST 1EK the right cylinder for a residential handleset or deadbolt retrofit?
For a residential handleset or deadbolt the format usually needed is a rim-type lazy motion cylinder, not a threaded mortise cylinder. The BEST 1EK Series is a mortise cylinder with 1.150-32 (NS-2A) thread and a 1-11/16 inch mounting length for a mortise lock body. For handleset and deadbolt retrofits, the Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1065244 is a 5-pin rim lazy motion cylinder with an Emtek tailpiece, and the 1065140 is a 5-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders. For an Emtek lock there is also the Emtek CY4 cylinder.
19) What finishes does the BEST 1EK high security mortise cylinder come in?
Ten: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, and 690 statuary dark bronze. If you are standardizing a building, 626 satin chrome and 613 oil-rubbed bronze are the two that most commonly match existing commercial lever and mortise trim.
How fast can I get the BEST 1EK7K4-C4RP3626-LC 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 1EK7K4-C4RP3626-LC come with a warranty?
Absolutely. The BEST 1EK7K4-C4RP3626-LC 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 1EK7K4-C4RP3626-LC?
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 1EK7K4-C4RP3626-LC from ZenSupply?
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