Understanding which lock function a customer needs can mean the difference between a happy customer or an unhappy one, if the lock doesn’t function how they expected.

The function is the mechanical behavior of the lock. The need (or not) for security on the door opening dictates what type of function is required. A door to a coat closet typically requires less security than a door to a mechanical room. As buildings become more complex, door openings and therefore door hardware also does . We offer over 35 ANSI functions that 

The use of the cylindrical mechanical lock entry function ANSI F109/Hager 53 and the office function ANSI F82/Hager 50 are sometimes misunderstood.

Per the Builders Hardware Manufacturers Association (BHMA) the functions are described as follows:

Entry: F109 (Hager 53) – Dead locking latch bolt operated by a lever from either side except when outside lever is locked by the push or turn button inside. Key outside or operating inside lever releases push or turn button unlocking outside lever except when push or turn button has been rotated to keep outside lever locked. Inside push or turn button must be manually operated to unlock outside lever. Inside lever always operates latch bolt.

Office: F82A (Hager 50) – Dead locking latch bolt operated by lever from either side except when outside lever is locked, operating key in outside lever or operating inside lever unlocks push button or other locking device and retracts latch bolt. Closing door does not release push bottom or other locking device.

The Pros: Both have free means of egress from inside the room to the outside.

The main difference is how each function locks.

F109 (Hager 53) – Entry Function: There are two ways this function locks. The first is by pressing the inside push button. That locks the outside lever and requires a key to gain entry. Turning the interior lever also unlocks the outside lever. If the push button is pressed in and turned, then the outside lever stays locked. Turning the inside lever will not unlock it. It would require the push button to be turned to the original position to be unlocked. In either locked position, the outside lever requires a key to unlock from the exterior side.

As an example, this lock function would work on a back exterior door to a small office building where the door stays secured as employees leave the building.  

It is easy to be locked out with this function so be careful.

F82A (Hager 50)Office function: Since most employees don’t walk around with keys or card readers all day within their office area (unless it is a high-security facility) this  function is a good choice for an office door. The outside lever can be locked by pushing the button on the interior lever or with a key from the exterior. The push button does not turn. A key is used to unlock the lever or simply turning the inside lever also unlocks.  

Determining the function by the name, entry and office might not be the best choice. Take a few extra minutes to ask how the room is going to be used in order to make the best choice.