Dexter Old style 4209 series Medium duty single cylinder deadbolt with 2-3/4 backset

Old style Dexter double cylinder deadbolt used on Steel Security and wood doors
This is what many older 1 inch thick Steel Security doors used.
They have a flat edge on the deadbolt latch and is about the only latch that will fit the old steel security doors.
The old Dexter Latch was only 7/8 inch wide and larger ones do not fit.

Brand: Dexter
Function: Double Cylinder, Key on both sides
Latch Backset: 2-3/4  inch (70mm)
Door Thickness: 1-3/4 ( will fit thinner doors when used with spacers )
Screws are for a 1-3/4" thick door, shorter screws may be needed for thinner doors.

Color / Finish: Antique Brass US5, Polished Brass US3
Dexter Part number: 4209x7A / 4209x3
Cylinder: 5 pin
Key Blank: DE6

Discontinued Lock - Limited to Existing Inventory

Note: Dexter was bought by Master and then Schlage: 
These are old Dexter / Master, NOT Dexter by Schlage.
Note: Old Dexter and Master are interchangeable Deadbolts, The Master had a different Latch design.