What replaced the D871 deadbolt?

The replacement for the D871 is the D271.  None of the parts are backwards compatible.

D271 description:

Thumbturn x Occupancy Indicator

Deadbolt thrown or retracted by turn unit only.  Occupancy indicator on outside (reads either "in use" or "vacant" with color coding). Bolt automatically deadlocks when fully thrown.
The Falcon D400 and D800 series (including the D871) were discontinued in 2008.

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