Locks - Sargent

Sargent products are high quality and popular among building owners.  Their biggest complaint is they are nearly impossible to order.  It's true Sargent has done a horrible job designing model numbers so we'll sort out the confusion.

Start with lock series, as there are 3 that are commonly ordered:

Lower end, medium duty.

Use for medium traffic doors.

Heavy duty.

Use for most commercial doors.

Extra heavy duty.

Use for very high traffic doors.

Lock Functions

Below are the most common functions

A 10 Line passage lock would be: 10U15
An 11 Line passage lock would be: 11U15

Notice that the Passage and Privacy functions use a "U", unguarded latch.  This is just a fancy name for a standard spring latch.  The "U" is completely unneeded as any non-key lock automatically comes with a standard spring latch.  Someone at Sargent just got a little overzealous with their model numbers.

Keyed locks always take a deadlatch.  These are simply spring latches with an extra feature added to prevent break ins.  Sargent calls these "Guarded" latches and sticks a "G" in the model number. Again, this is totally unnecessary.

Lock Options

One option used on locks has to do with backset, but since commercial doors use a 2-3/4'' backset this is rarely needed.  However, someone at Sargent got a little too cute and decided to make this simple option difficult.  Hopefully, they got a big raise for devising complex model numbers because it makes everyone else's life that much harder.

• 28 Prefix = standard backset (2-3/4")
• 23 Prefix = 3-3/4" backset
• 25 Prefix = 5" backset

A 10 Line passage lock would be: 28-10U15
An 11 Line passage lock would be: 28-11U15

Quick Tip

Ignore the "28" prefix as it just means standard backset.

Once you get over the hump of determining function, it's just a matter of specifying lever style and finish.  In short, you just have to learn what to ignore when dealing with Sargent locks.