We’ve just added a reference chart (direct link here) to the Library which contains function numbers, common names, and descriptions of the most popular ANSI/BHMA mortise, bored (cylindrical), interconnected, deadbolt, deadlatch, and deadlock functions. It’s laid out in a way that we think is streamlined for locksmiths who may have not fully committed these functions to memory.

If, for example, you wanted to decipher the function of a lock in hand OR you wanted to specify a function number based on the characteristics of the lock, you can quickly narrow it down by utilizing this sheet. This, we believe, is far more advantageous than the current method of reading multiple function descriptions via manufacturer’s literature.

The derived information should be compared to the manufacturer’s literature as final confirmation prior to ordering their specific lock.