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Bright brass cylindrical knob lock with pushbutton keypad and unified trim plate

Simplex

Simplex 1021S-3 Brass US3 Mechanical Knob Pushbutton Combination Door Lock

SKU CH-7BG2-3H0NY MPN 1021S-3

Mechanical pushbutton combination knob lock for LFIC Schlage cores with adjustable backset and three-hour fire rating

  • Backset distance2-3/4 in - 2-3/8 in
  • Lock keyingKeyed Different
  • Surface finishBright Brass
  • Sold asBox
  • Keyless entry via pushbutton combination eliminates key management costs
  • Mechanical operation removes battery replacement material and labour expense
  • Adjustable backset 60 mm or 70 mm fits standard door preparations
  • Fits wood or metal doors 35 mm to 57 mm thick
  • Three-hour UL/ULC fire rating on A-label doors for safety

Mechanical pushbutton lock for LFIC Schlage cores

This Simplex 1021S-3 mechanical knob lock grants exterior access by a single combination code programmed at the keypad. It removes the cost and labour of battery changes or key management. The heavy-duty cylindrical housing carries a three-hour UL/ULC fire rating on A-label doors.

Suits doors 35 to 57 mm thick

The adjustable latch fits wood or metal doors from 35 mm to 57 mm thick and a backset of either 60 mm or 70 mm. Free egress is always available from the inside. Buyers who need multiple user codes or audit trails should look at a different system.

Requires separate LFIC Schlage core to operate

The lock body is sold without a core; a Large Format Interchangeable Core compatible with Schlage keyways must be supplied and installed separately. Without that core the cylinder cannot be keyed and the lock will not function.

How it compares

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

Price $688.99
Pricier than about 92% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameSimplex
Model name1021S-3
Size & build
Surface finishBright Brass
Backset distance2-3/4 in - 2-3/8 in
More details
Lock keyingKeyed Different

Questions about this item

How do I confirm the 1021S-3 is working correctly after installation?

Enter your programmed code on the pushbutton keypad; the knob should turn smoothly to retract the 13 mm x 19 mm latch, then relock automatically when released, and the door must open freely from inside without a code.

What comes in the box and what must I purchase separately for the 1021S-3?

The box contains the mechanical combination lock body, both knob assemblies, unified trim plate, adjustable backset latch (60 mm or 70 mm), and mounting hardware; an LFIC Schlage core is not included and must be bought separately.

Which backset setting should I choose for the 1021S-3 on my door?

Measure from the door edge to the centre of the existing bore hole; if it is 60 mm use the 2-3/8" setting, if it is 70 mm use the 2-3/4" setting — the lock adjusts to either without extra parts.

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