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Satin brass mechanical pushbutton door lock with deadbolt

Simplex

Simplex 904-04 Satin Brass Mechanical Pushbutton Door Lock

SKU CH-K71W-KC6Q1 MPN 904-04

A keyless mechanical pushbutton combination lock with a 1-inch deadbolt, angle strike, and satin brass finish for doors 1-3/4 to 2-1/8 inches thick

  • Lock keyingKeyed Different
  • Surface finishSatin Brass
  • Sold asBox
  • Keyless entry with a single programmable code
  • No batteries required — fully mechanical operation
  • 1" deadbolt with angle strike for secure latching
  • Fits doors 1-3/4" to 2-1/8" thick
  • Force-resistant cast housing with clutch-protected thumbturn

Mechanical Keyless Entry

The Simplex 904-04 is a heavy-duty mechanical pushbutton lock finished in satin brass. It suits exterior doors where a single access code replaces physical keys and where battery changes are impractical. The lock fits doors from 1-3/4" to 2-1/8" thick and includes a 1" deadbolt with an angle strike.

Manual Relocking Required

The deadbolt does not relock automatically after each use; it must be thrown manually every time the door closes. A single code is programmed at the keypad without removing the lock from the door. The clutch-protected thumbturn allows free egress from inside while the cast front housing resists forced entry attempts.

Upgrade From Keyed Cylinders

This unit replaces traditional keyed cylinders where key management has become a burden or where power for electronic locks is unavailable. The jump is worth it when a building needs one shared code, zero battery maintenance, and a mechanical deadbolt that meets the 2-9/16" outswing or 2-1/2" inswing backset requirement.

How it compares

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

Price $114.99
Pricier than about 69% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameSimplex
Model name904-04
Size & build
Surface finishSatin Brass
More details
Lock keyingKeyed Different

Questions about this item

Does the 904-04 come in different backset options or finishes?

This model is offered only in satin brass with a 2-9/16" outswing backset and a 2-1/2" inswing backset built into the same unit.

What does the 1" deadbolt throw mean for daily security on a standard door?

The 25 mm bolt extends fully into the frame, giving a solid mechanical barrier that resists forced entry without relying on batteries or electronics.

How does the purely mechanical pushbutton design limit code management compared to electronic locks?

Only a single access code can be set, and it is programmed at the keypad without removing the lock; there are no multi-user codes, audit trails, or remote changes.

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