Kaba Ilco 19 Bit Key Rim Locks...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$17.21
Kaba Ilco Replacement Door Knobs

Kaba Ilco 19 Bit Key Rim Lockset Replacement Door Knob with Spindle and Set Screw

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Model: 198-04-51
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$17.21
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Kaba Ilco 19 Bit Key Rim Lockset Replacement Door Knob with Spindle and Set Screw

Kaba Ilco 19 replacement door knobs are purpose-built for bit key rim locksets used throughout commercial door hardware installations, classified within the Kaba Ilco mechanical locks lineup as a bored lockset knobset. Offered in solid brass, wrought steel with a durable brass-plated finish, or clear crystal acrylic with a crystal glass appearance, these knobs let facility managers and locksmiths match existing hardware or upgrade its look on commercial doors. Each knob arrives complete with a No. 751 #20 thread spindle and one No. 776 set screw, giving installers a precise, drop-in fit for a straightforward rim lockset replacement without sourcing additional hardware.

Key Features

  • Solid Brass Construction: Fashioned from solid brass for a durable, corrosion-resistant knob suited to heavy commercial use and frequent operation.
  • Brass-Plated Steel Option: Also available fashioned from wrought steel with a brass-plated finish for a rugged, economical alternative that still delivers a polished brass appearance.
  • Crystal Acrylic Option: Also available in clear acrylic with a crystal glass appearance for a decorative, upscale look on interior commercial doors.
  • Rim Lockset Compatibility: Designed to fit Kaba Ilco bit key rim locksets for straightforward, drop-in replacement without modifying the existing door prep.
  • Compatible Accessories, Spindle: Each knob is complete with a No. 751 #20 thread spindle, ensuring a precise, secure mechanical connection between knob and lockset.
  • Compatible Accessories, Set Screw: Includes one No. 776 set screw per knob to secure the knob firmly to the spindle and prevent loosening over time.
  • Commercial-Grade Design: Sized and finished as a bored lockset knobset for commercial door hardware applications requiring reliable, long-lasting knob replacement.
  • Knobset Classification: Categorized as a door knob within the bored locksets subgroup, suited to commercial rim lockset upgrades and repairs.

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 19?

Kaba Ilco 19 replacement door knobs are fashioned from solid brass, brass-plated wrought steel, or crystal acrylic to suit a wide range of commercial rim lockset installations. Each knob is complete with a No. 751 #20 thread spindle and a No. 776 set screw, keeping replacement straightforward and dependable for facility teams and professional locksmiths alike. Engineered for demanding commercial applications where consistent, reliable hardware fit and finish are essential, these knobs provide a dependable path to restoring or upgrading bit key rim lockset function without reworking existing door preparation.

Product Specs

Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Subcategory:
Door Knobs
Commercial/Residential:
Commercial
Handle Type:
Knob
Product Category:
Mechanical Locks
Department:
Door Hardware

Kaba Ilco 198-04-51 – Frequently Asked Questions

1) What comes with the Kaba Ilco replacement knobs, and do I need to buy a spindle separately?
The spindle is included. Each knob ships complete with a no. 751 #20 thread spindle and one 776 set screw per knob, so nothing extra is needed to hang the knob on an existing bit key rim lock. The rim lock body itself is separate.
2) I'm a property manager with old bit key rim locks on apartment doors and broken knobs. Can I just replace the knobs?
Yes, that's exactly what these are for. If the rim lock body still throws and the key still works, replacing the knob and spindle saves cutting a new prep into the door. Order the same style across the openings so the doors match, and pick solid brass if the doors see heavy traffic. Each knob arrives with its own #20 thread spindle and set screw.
3) The door is bored for a modern cylindrical lockset - what commercial passage knob replaces a bit key rim knob setup?
The Kaba Ilco knobs are replacement knobs on a #20 thread spindle for a bit key rim lockset, not a cylindrical chassis. For a door prepped for a standard bored lock, the Dexter C2000 Series passage ball knob lock is Grade 2 non-keyed for 1-3/8 inch to 1-3/4 inch doors, and the Corbin Russwin CK4310 is a Grade 1 passage/closet cylindrical lock with a Global knob for 1-3/8 inch to 2 inch doors. Both are complete locksets with latch, where the Ilco set supplies knobs only.
4) What is the closest equivalent to the Kaba Ilco replacement door knobs if I need a knob pair on a threaded rod rather than a complete bored lock?
The Kaba Ilco replacement knobs ship as knobs with a no. 751 #20 thread spindle and one 776 set screw per knob, in Solid Brass, Wrought Steel Brass Plated, or Crystal Acrylic. The comparable built the same way is the Emtek Porcelain Knobs with Threaded Rod, sold two knobs per set, which likewise gives you the knobs and the rod that joins them and no latch or bored chassis. Both are knob-and-spindle replacements for a door that already has its lock mechanism in place, so the deciding factor is knob material and whether the existing spindle thread matches.
5) I want the glass-look knob but on a door with no working lock case - what should I order instead?
The Kaba Ilco Crystal Acrylic knob has a crystal glass appearance but arrives as a knob and spindle set, so it needs a functioning lock case already in the door to turn. Where there is no working mechanism and the knob is only being pulled, the Emtek Classic Brass Crystal Knobsets in the Georgetown or Providence knob are dummy function and sold as a pair, mounting directly to the door face. Choose by whether the door still has a latch to retract.
6) Are the Sargent 78-2875 or Imperial ED-BKL580 knobs an alternative to the Kaba Ilco replacement knobs?
They look similar in a search result but they are not interchangeable. The Sargent 78-2875 is an outside knob only with B design for the 7800 Series, and the Imperial USA ED-BKL580 is knob trim in storeroom function for the ED-500 Series - both are trim that mounts to a specific exit device. The Kaba Ilco knobs mount on a no. 751 #20 thread spindle held by 776 set screws, so they fit a spindle-driven lock rather than an exit device chassis.
7) What material choices are there for Kaba Ilco replacement door knobs?
Three: solid brass, wrought steel with brass plating, and clear crystal acrylic with a glass look. All three use the same no. 751 #20 thread spindle and 776 set screw, so the choice is appearance and construction, not fit. Solid brass wears best where the knob gets constant traffic; the brass plated steel matches the brass look at a lighter build; the acrylic gives the crystal glass appearance on period doors.
8) Are the Kaba Ilco crystal acrylic knobs a substitute for glass or porcelain knobs?
They look the part, not the same material. The Kaba Ilco version is clear acrylic with a crystal glass appearance and mounts on a #20 thread spindle for a bit key rim lock. If the door has a bored prep instead, Emtek's Classic Brass Crystal Knobsets in the Georgetown or Providence knob, or Emtek's Porcelain Knobs with threaded rod, cover the same look on modern hardware.
9) Are these Kaba Ilco knobs rated for commercial use?
They're catalogued for commercial duty, and the solid brass version is the one to specify where the door gets institutional traffic. Note they are knob trim for a bit key rim lock, not a graded cylindrical lockset. If a facility spec calls for a Grade 1 knob lock, a heavy duty option like the BEST 8K Series entrance knob lock or the Falcon X101 Grade 1 passage knobset for 1-3/8 to 2-1/4 inch doors is what meets that requirement.
10) How does the Kaba Ilco knob attach to the spindle?
By set screw. One 776 set screw ships per knob, and it clamps the knob onto the no. 751 #20 thread spindle. That means the knob position on the spindle is adjustable during install, which is what lets a single spindle work across the door thicknesses these old rim locks live on.
11) I need a knob for a door with no lock in it, just a pull. Will this work?
Not really. These knobs are made to drive a bit key rim lock through a threaded spindle, so on a door with no lock body there is nothing for the spindle to turn. For a non-functioning knob on a closet or false door, a dummy trim is the correct part, such as the Schlage A170 single dummy or the Omnia 434/0 solid brass egg-shaped single dummy.
12) If the opening needs a lock rather than just new knobs, what keyed knobsets cover the same door?
The Kaba Ilco set is a replacement knob and spindle with no cylinder of its own. Where the opening has to lock, the Dexter C2000 Series entry/office ball knob lock is Grade 2 keyed for 1-3/8 inch to 1-3/4 inch doors, the Cal-Royal BER00 is a Grade 3 entrance/office knob lock with a Kwikset keyway over the same thickness range, and the Corbin Russwin CK4851 is an entrance/office cylindrical lock with a conventional cylinder for 1-3/8 inch to 2 inch doors. These carry their own cylinder and latch, which the knob replacement does not.
13) What knob option carries an ANSI grade for a high-traffic commercial corridor?
The Kaba Ilco replacement knobs are a commercial door hardware item in solid brass, brass plated wrought steel, or crystal acrylic, supplied as knobs on a spindle. Where the specification calls out a graded chassis, the BEST 8K Series entrance knob lock is Grade 1 heavy duty, the Falcon X101 is a Grade 1 heavy duty passage knobset with interchangeable core and a fire rating for 1-3/8 inch to 2-1/4 inch doors, and the Sargent 8XG04 is a Grade 1 heavy duty storeroom knob lock with a 2-3/4 inch backset.
14) I only need a knob on one face of a non-operating door - is the Kaba Ilco knob the right pick?
The Kaba Ilco knobs come with a spindle and set screws intended to drive a lock, so a door with nothing to operate is better served by a dummy trim. The Schlage A170 single dummy trim is a Grade 2 non-keyed knob for 1-3/8 inch to 1-7/8 inch doors, the BEST 6K Series single dummy trim is Grade 2 medium duty, and the Omnia 434/0 egg-shaped single dummy is solid brass construction. Each mounts fixed to the door face with no spindle running through.
How fast can I get the Kaba Ilco 198-04-51 delivered?
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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 Kaba Ilco 198-04-51 come with a warranty?
Absolutely. The Kaba Ilco 198-04-51 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 198-04-51?
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
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