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Bright brass cylindrical lever lock with pushbutton keypad, left-hand orientation

Simplex

Simplex L1021S-LH-3 Bright Brass US3 Left Hand Door Lock

SKU CH-TSSY-19KRA MPN L1021S-LH-3

Mechanical pushbutton lever lock with adjustable backset for doors 35 to 57 mm thick, accepting Schlage LFIC core sold separately

  • FinishBright Brass
  • Selling UnitBox
  • Backset2-3/4" - 2-3/8"
  • KeyingKeyed Different
  • Mechanical pushbutton entry removes battery maintenance costs
  • Single access code programmed at keypad without door removal
  • Adjustable backset fits 60 mm and 70 mm door preparations
  • 3-hour UL/ULC fire rating on A-label doors
  • ADA-compliant lever with heavy-duty cylindrical housing

Mechanical Lever Pushbutton Combination Lock

The Simplex L1021S-LH-3 is a heavy-duty cylindrical lever lock with a Bright Brass US3 finish. It provides exterior access by key or a single combination code while allowing free egress from the interior. The mechanical design eliminates the material and labour expense of battery replacements. It carries a 3-hour UL/ULC fire rating on "A" label doors.

Adjustable Backset and LFIC Compatibility

The lock features an adjustable backset of 60 mm to 70 mm and a latch length of 13 mm by 19 mm. It is designed for Large Format Interchangeable Core (LFIC) Schlage cylinders, though the core is sold separately. A unified trim plate and fixed ADA-compliant levers simplify installation on wood or metal doors between 35 mm and 57 mm thick.

Left-Hand Doors Requiring Keyless Heavy-Duty Access

This unit suits commercial or residential left-hand doors where a durable, battery-free keyless entry solution is needed. It is not suitable for right-hand door configurations. Buyers who need a different finish, a non-LFIC cylinder format, or a lock with multiple programmable codes should consider other options.

Highlights

  • Mechanical pushbutton entry removes battery maintenance costs
  • Single access code programmed at keypad without door removal
  • Adjustable backset fits 60 mm and 70 mm door preparations
  • 3-hour UL/ULC fire rating on A-label doors
  • ADA-compliant lever with heavy-duty cylindrical housing

Specifications

BrandSimplex
ModelL1021S-LH-3
FinishBright Brass
Selling UnitBox
Backset2-3/4" - 2-3/8"
KeyingKeyed Different

Questions about this item

How often will the mechanical pushbutton combination mechanism need servicing or replacement?

The lock is fully mechanical with no batteries, so it avoids the material and labour cost of battery replacements; only the latch and lever assembly may need attention after very long service.

What is the first limitation that appears under continuous heavy use of the lever and latch?

The 1/2" (13 mm) latch throw and heavy-duty cylindrical housing are built for high-cycle operation; the adjustable backset of 60 mm to 70 mm does not impose a cycle limit.

Does the lock generate any noise, heat or power draw when it remains in service all day?

No — it is a purely mechanical device with no electrical components, so it produces no heat, draws no power and operates silently during normal use.

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