The current standard installation prep - a
2-1/8” hole drilled through face of door
to receive a modern-style “cylinder latch” mechanism.
Measurement from edge of door to center
of doorknob (and spindle hub where spindle
passes through latch).
A mechanism that locks a door shut only.
The diameter of the hole drilled in a
door for an entry set knob, lever or deadbolt.
A rotating piece attached to the end of
the cylinder plug to engage the locking mechanism.
The box containing the lock mechanism.
Refers to a machining procedure
that requires a round hole to accommodate a
standard entry set.
A lock in which the locking
mechanism is controlled by a cylinder.
Locking mechanism for an entrance
door or other door. Deadbolts can be a single
cylinder or double cylinder. With a single
cylinder deadbolt, a key is used on the outside
and is turned by hand on the inside. With a
double cylinder deadbolt, a key is used on
A set of two knobs (w/spindle) and
two escutcheons for decorative door trim. Latch
An angle or channel-shaped guard
used to protect the edge of a door.
A plate long enough to span a lock
case and having holes for knob bushing, bit
key, cylinder, turn knob and similar operating
members as required.
Finish Builders’ Hardware
has a finished appearance as well as a functional
purpose. Also termed Architectural Hardware,
Finish Hardware and Builders’ Hardware.
The stile to which the hinges
are applied as distinguished from the lock
A small plate or escutcheon having
only a keyhole.
The projecting stem of a knob into
which the spindle is fastened.
A lock, complete with trim, such
as knobs, escutcheons or handles.
A mechanism that holds a door shut and
offers a locking option.
A lock designed to be installed
in a mortise rather than applied to the door’s
A lock that has all the
parts assembled as a unit at the factory, and
when installed in a rectangular notch cut into
the door edge, requires little or no disassembly.
A circular escutcheon behind a knob.
A small screw in the shank of a
knob that is tightened to fix the knob on the
The projecting stem of a knob into which
the spindle is fastened.
A square steel rod connecting two
doorknobs through the latch. The spindle can
be threaded or have holes in its side, depending
on what type of knob it’s used with.
A metal plate or box that is pierced
or recessed to receive the bolt or latch when
projected. Sometimes called Keeper.
Throw (of a deadbolt or latch bolt)
of the maximum projection when bolt is fully
A guard or obstruction that prevents
operation of a bolt except by insertion of
the proper key
A term used to describe a lock,
a door closer or other device that can be used
on doors of any hand without change.