
40H Series Service Manual 2–1
2
INTRODUCING THE 40H LOCK
OVERVIEW
The 40H Series Lock was designed to be easy to use,
while at the same time maintaining the strength,
durability, and dependability expected of a BEST
mortise lock. In addition to the ability to quickly
change the lock handing, the universal case design of
the 40H Series Lock provides the ability to
reconfigure a lock into many different functions
easily and quickly, often by rearranging existing
parts without opening the lock case. The 40H Series
Lock lets you postpone decisions about how the lock
will be configured all the way up to the point of
installation, making it one of the most flexible and
user-friendly mortise locks available.
WAYS TO ORDER
There are three ways to order 40H Series Locks—
function-specific locks, universal locks, and three-
part locks.
Function-specific
locks
If you know exactly what you need in a mortise lock
and are confident these needs will not change, order
your 40H Series Locks in the traditional manner by
specifying the exact function, trim, finish, and
handing. The lock will be built to work exactly as
specified, so it may not have the ability to be
converted to another function.
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