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Gray mechanical pushbutton combination door lock, rectangular front housing, no key cylinder visible

Simplex

Simplex 6204-86 door lock, gray mechanical pushbutton combination, 70mm backset, no key

SKU CH-S4M3-QF7DB MPN 6204-86

Mechanical pushbutton combination lock with 70mm backset, 13mm latch throw and 3-hour UL fire rating for doors 35–57mm thick

  • Backset distance2-3/4 in
  • Lock keyingNO KEY
  • Surface finishGray
  • Product typeMechanical Pushbutton Combination Lock With 2-3/4 in Backset
  • Keyless entry removes key management hassle
  • Mechanical operation needs no batteries or wiring
  • 3-hour UL/ULC fire rating protects "A" labeled doors
  • Fits doors 35 to 57 mm thick for wood or metal
  • 70 mm backset and 13 mm latch suit standard preps

Product Identity

The Simplex 6204-86 is a gray mechanical pushbutton combination lock designed for exterior access without keys. It suits commercial or residential doors where a single shared code replaces physical credentials and battery maintenance is unwanted.

Deciding Specification

The lock requires a 70mm backset cut-out and fits doors between 35mm and 57mm thick. If the existing preparation or door thickness falls outside these dimensions the lock cannot be installed.

Installation Context

A floating faceplate and standard strike plate are included for wood or metal doors. The all-metal cast housing with clutch-protected thumbturn and fixed interior knob allows free egress at all times while the 3-hour UL/ULC fire rating satisfies requirements for "A" labeled doors.

How it compares

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

Price $362.99
Pricier than about 90% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameSimplex
Model name6204-86
Product typeMechanical Pushbutton Combination Lock With 2-3/4 in Backset (NO KEY)
Size & build
Surface finishGray
Backset distance2-3/4 in
More details
Lock keyingNO KEY

Questions about this item

How does the 70mm backset affect where I drill the hole in my door?

The 70mm backset means you drill the bore hole centre 70mm from the door edge. This matches the common 2-3/4 inch standard used on many commercial and residential doors.

What does the 3-hour UL/ULC fire rating cover for this lock?

The lock carries a 3-hour UL/ULC fire rating for "A" labeled doors, meaning it can remain secure and operable during a three-hour fire test on a rated door assembly.

What door thicknesses does the 6204-86 fit without extra parts?

It fits doors from 35mm to 57mm thick (1-3/8 to 2-1/4 inches) using the supplied components, with a unified interior trim plate and fixed interior knob included.

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