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Satin chrome mechanical knob pushbutton combination door lock

Simplex

Simplex 1021C-26D Satin Chrome Mechanical Knob Pushbutton Combination Door Lock

SKU CH-B4Q4-XS6DE MPN 1021C-26D

Mechanical pushbutton knob lock for LFIC Corbin Russwin cores with adjustable backset and satin chrome finish

  • Backset distance2-3/4 in - 2-3/8 in
  • Lock keyingKeyed Different
  • Surface finishSatin Chrome
  • Sold asBox
  • Keyless entry with single programmable access code
  • Mechanical operation removes battery replacement cost and labour
  • Adjustable backset fits 60 mm and 70 mm door preparations
  • Heavy-duty cylindrical housing with 3-hour UL/ULC fire rating
  • ADA-compliant fixed knob on unified trim plate

Mechanical knob pushbutton lock

The Simplex 1021C-26D is a heavy-duty mechanical combination lock with a satin chrome finish. It provides keyless exterior access via a single programmable code while allowing free egress from the inside. The cylindrical latch carries a three-hour fire rating for labeled doors.

Door thickness and core compatibility

Verify that your door thickness falls between 35 mm and 57 mm before ordering. The lock requires a separately purchased LFIC Corbin Russwin 6-pin length core to operate; it will not function with other core types or without a core installed.

Adjustable backset and fixed ADA knobs

The adjustable backset covers 60 mm and 70 mm positions to match existing door preparations. Fixed ADA-compliant knobs and a unified trim plate are integrated into the cast front housing, removing the need for separate lever or trim purchases.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $654.99
Pricier than about 92% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameSimplex
Model name1021C-26D
Size & build
Surface finishSatin Chrome
Backset distance2-3/4 in - 2-3/8 in
More details
Lock keyingKeyed Different

Questions about this item

Does the 1021C-26D include a Corbin Russwin LFIC core or must I buy it separately?

The lock is built for LFIC Corbin Russwin 6-pin cores; the core is sold separately and must be purchased on its own.

Which backset should I select for a door pre-drilled at 60 mm versus 70 mm?

The adjustable backset covers both 2-3/8" (60 mm) and 2-3/4" (70 mm), so one unit fits either preparation.

What does the 3-hour UL/ULC fire rating on "A" label doors mean for daily use?

The cylindrical latch assembly has passed a 3-hour fire test on "A" label doors, confirming it will maintain integrity during a fire event.

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