What sizes do tubular latches come in?

Tubular Latch Sizes

• The Tubular Latch Sizes come in five industry-standard lengths: 64mm, 76mm, 102mm, 127mm, and 152mm. These are the measurement of the overall size of the latch case, each of these sizes has it’s own unique ‘Backset.’ measurement.
• 64mm = 45mm.
• 76mm=56mm.
• 102mm = 82mm.
• 127mm=107mm.
• 152mm = 130mm.

How do I measure a tubular latch?

You can take a quick measurement to determine for sure what size latch you need. Do this by measuring the width of your door stile, and halving the measurement you have taken. That will give you size of Backset you need to get to position your handle in the centre of the door stile.

What is backset size of tubular latch?

The backset is the distance from the edge of the door to the spindle mechanism on the latch. Usually a 63mm case measurement will have a 44mm backset and a 76mm case measurement will have a 65mm backset. The backset you choose is where your door knobs will sit on the door (where the spindle goes through).

What is a double sprung tubular latch?

The term double sprung tubular latch means the latch has a separate spring for the Latch-bolt (tongue) action, which allows a smooth, soft close to the door.

Are all door latches the same?

In the United States, there are two common backsets for residential door locks: 2 3/8 inches and 2 3/4 inches. Pack your locks with a 2-3/8-inch or 2-3/4-inch latch, depending on which backset you specify.

What is the difference between mortise and tubular?

A tubular lock has its latch bolt and dead bolt in two separate holes. In a mortise lock, both bolts are encased in a steel box that fits in one hole.

What size backset do I need?

You can work out the size of the lock by measuring the distance from the edge of the door to the centre of the door handle or knob. This measurement will give you the approximate size of the backset which will allow you to identify which size lock or latch you have.