Kaba Ilco CAPTK Captive Turnkn...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$64.07
Kaba Ilco Kaba Ilco Captive Turknob Cylinders ILC-CAPTK

Kaba Ilco CAPTK Captive Turnknob Brass Mortise Cylinder with Schlage® and Weiser® Key Compatibility and Dual Key Function

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Model: 41671-SC-1-26D
$64.07
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$64.07
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Kaba Ilco Captive Turnknob Brass Mortise Cylinder with Schlage® and Weiser® Key Compatibility

Kaba Ilco captive turnknob mortise cylinders provide a broad, brass-constructed cylinder solution built for numerous commercial door applications. Each cylinder delivers one turnknob key and one conventional key, with conventional keying limited to Schlage® or Weiser® keyways only. Offered in 03 and 26D finishes and in three lengths, these mortise cylinders are engineered to integrate with existing commercial door hardware as a direct replacement component. The Ilco brass mortise cylinder line offers the flexibility to cover a wide range of commercial locking applications.

Key Features

  • Broad Application Coverage: Part of the Ilco brass mortise cylinder line, offering the flexibility to cover numerous commercial locking applications.
  • Captive Turnknob Function: Each cylinder includes one turnknob key and one conventional key, enabling dual operation from a single cylinder body.
  • Schlage® and Weiser® Key Compatibility: Conventional keying is limited to Schlage® or Weiser® keyways only, ensuring precise fit with existing commercial key systems.
  • Finish Options: Available in 03 and 26D finishes to match surrounding commercial door hardware.
  • Multiple Length Options: Offered in three lengths to accommodate varying mortise cylinder installation requirements.
  • Brass Construction: Built with brass cylinder components for long-term reliability in commercial use.
  • Replacement Part Design: Engineered as a parts-and-accessories replacement component for existing commercial mortise lock systems.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

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

Why Kaba Ilco Captive Turnknob?

Kaba Ilco captive turnknob mortise cylinders deliver brass-constructed reliability designed for demanding commercial door applications. With Schlage® and Weiser® keyway compatibility plus multiple finish and length options, these cylinders integrate seamlessly as replacement components within existing commercial locking systems. Ilco's broad mortise cylinder lineup gives facility managers and locksmiths the flexibility to cover numerous commercial applications with a single, consistent source for replacement hardware across multiple door and keyway configurations in the field.

Product Specs

Product Group:
Parts and Accessories
Product Subgroup:
Cylinders
Product Type:
Cylinders
Subcategory:
Cylinders
Commercial/Residential:
Commercial
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Model:
Captive Turnknob Cylinder
Product Function:
Turnkob
Product Category:
Parts and Accessories
Department:
Door Hardware

Kaba Ilco 41671-SC-1-26D – Frequently Asked Questions

1) What lengths do the Kaba Ilco captive turnknob cylinders come in?
Three lengths are made: 15/16 inch, 1 inch, and 1-1/8 inch. Length is the measurement that decides whether the cylinder sits flush in the lock case behind your ring or plate, so pull the existing cylinder and measure it before ordering. Every one of the three lengths is offered in both keyways and both cam styles.
2) What is the difference between the standard cam and the Lori deadbolt cam on these Ilco cylinders?
Cam choice is what actually drives the lock, so it has to match the lock case, not your preference. The captive turnknob cylinder is built with either a standard cam or a Lori deadbolt cam. Order the Lori cam only if you are feeding a Lori-prepped deadbolt; for general mortise lock work the standard cam is the one. A wrong cam threads in fine and does nothing when you turn the key.
3) Can I use this Ilco cylinder in a rim exit device?
No. The captive turnknob is a mortise cylinder, it threads into a mortise-prepped lock case and drives a cam. A rim exit device needs a rim cylinder with a tailpiece. For that use a Schlage 20-021 with a vertical tailpiece cam or the 20-022 with a horizontal tailpiece cam, or the Corbin Russwin 3070 6-pin rim housing with a 1-7/8 inch tailpiece.
4) I manage a building on a BEST interchangeable core system. Can I put these Ilco cylinders on the same key?
No. The Ilco captive turnknob is a conventional pinned cylinder in Schlage C or Weiser E / Falcon, not an interchangeable core, so it will not take a BEST core or run on a BEST control key. For an IC system stay with cores like the BEST 1C 5-pin standard core or the 1CB 150 Series interchangeable core cylinder.
5) What is the difference between an Ilco captive turnknob mortise cylinder and a Detex MC65 mortise cylinder?
Both are mortise cylinders and both can be had in the Schlage C keyway. The Ilco captive turnknob cylinder is keyed on one side and operated by a turnknob that stays captive on the cylinder, so it takes one turnknob key and one conventional key, in Schlage or Weiser keyways, in 15/16 inch, 1 inch and 1-1/8 inch lengths. The Detex MC65 is a straight 6-pin Schlage C keyway mortise cylinder at 1-1/8 inch, keyed on the outside with no turnknob. Use the Ilco where the inside of the opening has to be turned by hand without a key, and the MC65 where both sides are keyed or the inside is operated by the lock's own thumbturn.
6) Is a Corbin Russwin 1000 mortise cylinder an equivalent replacement for an Ilco captive turnknob cylinder?
Not a direct one. The Corbin Russwin 1000 is a Grade 1 mortise cylinder at 1-1/2 inch length with an A02 straight cam and is key-operated. The Ilco captive turnknob cylinder pairs one turnknob key with one conventional key and comes in 15/16 inch, 1 inch and 1-1/8 inch lengths with either a standard cam or a Lori deadbolt cam. If the opening needs an inside turnknob rather than a second key, go with the Ilco; if the mortise lock body calls for a 1-1/2 inch key cylinder with a straight cam, the CR1000-112 is the match.
7) If I want the cylinder to be rekeyable without pulling it out of the door, what should I use instead of an Ilco captive turnknob cylinder?
An interchangeable core cylinder does that. The BEST 1CB Peaks 150 series is an interchangeable core cylinder, the Corbin Russwin 1080 is a 1-1/2 inch 6-pin LFIC mortise cylinder for Schlage L9000 mortise locks with an A01 cloverleaf cam, and the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam. The Ilco captive turnknob cylinder is a conventional pinned brass mortise cylinder with a captive turnknob, so rekeying it means working the plug rather than swapping a core.
8) Which cylinder carries a Grade 1 rating if my specification requires one?
The Adams Rite 4036 mortise cylinder is Grade 1, five-pin, and fits a door thickness of 1/2 inch minimum, and the Corbin Russwin 1000 and 1070 are Grade 1 series mortise cylinders as well. Pick from those when the drawing calls out a grade. The Ilco captive turnknob cylinder is the choice when the requirement is a turnknob inside with a conventional key outside in Schlage C or Weiser E Falcon.
9) My opening uses a Lori deadbolt - do I need a special cam, or can I use a standard cylinder?
Order the Ilco captive turnknob cylinder with the Lori deadbolt cam rather than the standard cam; it is available that way in both Bright Brass and Satin Chrome, in Schlage C and Weiser E Falcon keyways. Peer mortise cylinders carry their own cam callouts that will not suit it - the Corbin Russwin 1000 is supplied with an A02 straight cam and the 1070 with an A01 cloverleaf cam.
10) What is a captive turnknob mortise cylinder and when do I use one instead of a regular mortise cylinder?
A captive turnknob cylinder is a brass mortise cylinder with a thumbturn on the inside that stays captive to the cylinder body, so the same housing gives you key operation on one side and turn operation on the other. The Kaba Ilco captive turnknob is set up with one turnknob key and one conventional key per cylinder. Use it where you want an inside thumbturn on a mortise deadlock or storefront-style lock. If you only need key operation on both sides, a straight mortise cylinder like the Corbin Russwin 1000 Series with an A02 straight cam is the plainer choice.
11) What finishes are available on the Ilco captive turnknob cylinder, and will they match my other door hardware?
Two finishes: bright brass (03) and satin chrome (26D). Satin chrome 26D is the usual commercial match for aluminum storefront and satin stainless trim; bright brass suits older brass storefront and wood door hardware. Both finishes are available across all three lengths and both keyways, so you are not forced into a length to get the finish you want.
12) What else could I use if I need a mortise cylinder in Schlage C but not a turnknob?
The Detex MC65 is a 6-pin mortise cylinder in Schlage C keyway at 1-1/8 inch, which is the same keyway and the same length as one of the Ilco captive turnknob builds, just key-only on both faces. If the job is on an Adams Rite style storefront deadlock, the Adams Rite 4036 is a Grade 1 mortise cylinder that seats from a 1/2 inch minimum door thickness. Neither gives you an inside thumbturn.
13) What is the alternative to the Ilco captive turnknob cylinder on a wood door deadlock?
The Adams Rite 4026 is a five pin tumbler cylinder pull made for the Adams Rite 5017 wood door deadlock and deadlatch, so that is the one that suits a wood door running that lock. The Ilco captive turnknob cylinder is a brass mortise cylinder with a turnknob side and a keyed side, ordered in Schlage C or Weiser E Falcon keyway.
14) What is the difference between the Ilco captive turnknob cylinder and a Medeco lazy motion rim cylinder for a residential handleset?
The Medeco 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, and the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, so those are aimed at retrofitting residential deadbolt and handleset hardware. The Ilco captive turnknob cylinder is a commercial brass mortise cylinder in Schlage C or Weiser E Falcon keyway with a captive turnknob for the inside.
15) I only need to fill a cylinder hole with no key function - is there a simpler option than the Ilco captive turnknob cylinder?
Yes. The BEST 12E series dummy rim cylinder has a 1-5/32 inch diameter and provides the cylinder appearance without key operation. The Ilco captive turnknob cylinder is a working cylinder supplied with one turnknob key and one conventional key, so it is the wrong part where nothing has to operate.
16) Is the Ilco captive turnknob cylinder rated for commercial use?
It is a commercial door hardware cylinder, built in brass for mortise applications and sold as a replacement part rather than a complete lock. You are buying the cylinder alone, so the lock body, trim, and ring have to already be in the door or ordered separately.
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Does the Kaba Ilco 41671-SC-1-26D come with a warranty?
Absolutely. The Kaba Ilco 41671-SC-1-26D 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 Kaba Ilco 41671-SC-1-26D?
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